-84 is an even number.
-84 is a Harshad number, which means it is divisible by the sum of its digits (8 + 4 = 12, and -84 is divisible by 12).
In binary, -84 is represented as 1111111111111111111111111111111111111111111111111111111110101100.
In hex, -84 is represented as ffffffffffffffac.