60

60 (sixty) is the natural number following 59 and preceding 61. Being three times twenty, 60 is called "three score" in some older literature.

Sixty is a composite number with divisors 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 making it also a highly composite number. Because 60 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number. Being ten times a perfect number, 60 is a semiperfect number.

60 is the smallest number divisible by the numbers 1 to 6. (There is no smaller number divisible by the numbers 1 to 5). 60 is the smallest number with exactly 12 divisors.

This number is the sum of a pair of twin primes (29 + 31), as well as the sum of four consecutive primes (11 + 13 + 17 + 19). It is adjacent to two prime numbers (59,61).

The smallest non-abelian simple group has order 60.

In geometry, 60 is the number of seconds in a minute, and the number of minutes in a degree. In normal space, the 3 interior angles of an equilateral triangle each measure 60 degrees, adding up to 180 degrees.

The Babylonian number system had a base of sixty. The number system in the Mali Empire was apparently also based on sixty (this is reflected in the counting system of the Maasina Fulfulde, a variant of the Fula language spoken in contemporary Mali). A number system with base-sixty is called the sexagesimal (original meaning of sexagesimal is sixtieth).

The sexagenary cycle plays a role in Chinese calendar and numerology. (Originally, sexagenary means sixty each, also centenary means one hundred each.)

Because 60 is divisible by the sum of its digits in base 10, it is a Harshad number.

In German: das Schock and in Latin: sexagena equals 60 = 5 dozen = 1/2 small gross. This quantity was used in international medieval treaties e.g. for ransom of captured Teutonic Knights.

* Judaism
o In the laws of kashrut, the proportion (60:1) of kosher to non-kosher ingredients which can render an admixture kosher post-facto. (Talmud, Tractate Chullin 98b ; Shulchan Aruch, Yoreh Deah 98)
o In the Bedtime Shema, the number of strong men (giborim) said to surround King Solomon's bed.

Sixty is:

* The number of feet in the standard measurement tool to evaluate an automotive launch on a dragstrip. It's the time that it took to travel the first 60 feet (18 m) of the track.
* The number of miles per hour an automobile accelerates to from a complete stop (0-60) as one of the standard measurements of performance
* In time, the number of seconds in a minute, and the number of minutes in an hour.
* 60 Minutes, a CBS investigative television show
* Sixty Minute Man was a TV show starring Kenny Baumann
* The number of the European route E60 from Brest, France, to Constanţa, Romania
* Municipal Okrug 60, name of Posadsky Municipal Okrug of Petrogradsky District of St. Petersburg, Russia until April 2009
* A common speed limit, in miles per hour, for freeways in many U.S. states
* A common speed limit, in kilometers per hour, in urban areas in Russia
* In years of marriage, the diamond wedding anniversary
* The maximum number of marbles (game pieces) in Chinese checkers
* The code for international direct dial calls to Malaysia
* The highest obtainable level on World of Warcraft (not including World of Warcraft: The Burning Crusade)
* Studio 60 on the Sunset Strip was a TV show on NBC (2006-07)
* Gone in Sixty Seconds is a movie starring Nicolas Cage
* Miss Sixty is a women's apparel brand
* The total number of cards in the game Racko
* The number of the French department Oise
* Alpha 60 is a brain-computer in the movie Alphaville directed by Jean-Luc Godard

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