255877866 has 40 divisors (see below), whose sum is σ = 588865860. Its totient is φ = 82985472.

The previous prime is 255877819. The next prime is 255877877. The reversal of 255877866 is 668778552.

255877866 is a `hidden beast` number, since 2 + 558 + 7 + 7 + 86 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 249482025 + 6395841 = 15795^2 + 2529^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15351 + ... + 27338.

Almost surely, 2^255877866 is an apocalyptic number.

255877866 is an abundant number, since it is smaller than the sum of its proper divisors (332987994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255877866 is a wasteful number, since it uses less digits than its factorization.

255877866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42740 (or 42731 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The square root of 255877866 is about 15996.1828571694. The cubic root of 255877866 is about 634.8594278289.

The spelling of 255877866 in words is "two hundred fifty-five million, eight hundred seventy-seven thousand, eight hundred sixty-six".