Wikipedia: Sixty

Sixty
From Wikipedia, the free encyclopedia.

60 (sixty) is a natural number following fifty-nine and preceding sixty-one.

Mathematics

It is a composite number with the divisors being 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, making it also a highly composite number.

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).

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.

Sixty is:

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 code for international direct dial calls to Malaysia.
the year AD 60.

59 and 61

	Wikipedia: Sixty