60 (number)

60 is the natural number following 59 and preceding 61.

List of numbers — Integers

<< 60 61 62 63 64 65 66 67 68 69 >>

Cardinal sixty
Ordinal sixtieth
Numeral system sexagesimal
Factorization
Roman numeral LX
Binary 111100
Hexadecimal 3C

Mathematics

Sixty is a composite number with divisors 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, making it also a highly composite number. Because 60 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number. And because it is divisible by the sum of its digits in base 10, it is a Harshad 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).

This number is the sum of a pair of twin primes (29 + 31), as well as the sum of four consecutive primess (11 + 13 + 17 + 19).

The smallest non-abelian simple group has order 60.

In normal space, the interior angles of an equilateral triangle each measures 60 degrees, adding up to 180 degrees.

The Babylonian number system had a base of sixty. A number system with base sixty is called a sexagesimal number system.

The Sexigesimal cycle plays a role in Chinese numbering and numerology.

Other fields

Sixty is also:

the atomic number of neodymium, a lanthanide.
in the measurement of time, the number of seconds in a minute, and the number of minutes in an hour.
in geometry, the number of seconds in a minute, and the number of minutes in a degree.
a common speed limit, in miles per hour, for freeways in many US states.
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 year AD 60, 60 BC, or 1960.