-261 is an odd number.
-261 is a Harshad number, which means it is divisible by the sum of its digits (2 + 6 + 1 = 9, and -261 is divisible by 9).
In binary, -261 is represented as 1111111111111111111111111111111111111111111111111111111011111011.
In hex, -261 is represented as fffffffffffffefb.