-80 is an even number.
-80 is a Harshad number, which means it is divisible by the sum of its digits (8 + 0 = 8, and -80 is divisible by 8).
In binary, -80 is represented as 1111111111111111111111111111111111111111111111111111111110110000.
In hex, -80 is represented as ffffffffffffffb0.