-60 is an even number.
-60 is a Harshad number, which means it is divisible by the sum of its digits (6 + 0 = 6, and -60 is divisible by 6).
In binary, -60 is represented as 1111111111111111111111111111111111111111111111111111111111000100.
In hex, -60 is represented as ffffffffffffffc4.