255291866 has 16 divisors (see below), whose sum is σ = 403690560. Its totient is φ = 120748320.

The previous prime is 255291863. The next prime is 255291887. The reversal of 255291866 is 668192552.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (255291863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23006 + ... + 32246.

It is an arithmetic number, because the mean of its divisors is an integer number (25230660).

Almost surely, 2^255291866 is an apocalyptic number.

255291866 is a deficient number, since it is larger than the sum of its proper divisors (148398694).

255291866 is a wasteful number, since it uses less digits than its factorization.

255291866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989.

The product of its digits is 259200, while the sum is 44.

The square root of 255291866 is about 15977.8554881436. The cubic root of 255291866 is about 634.3744152033.

The spelling of 255291866 in words is "two hundred fifty-five million, two hundred ninety-one thousand, eight hundred sixty-six".