255850915666 has 16 divisors (see below), whose sum is σ = 390459216600. Its totient is φ = 125702052480.

The previous prime is 255850915657. The next prime is 255850915667. The reversal of 255850915666 is 666519058552.

It can be written as a sum of positive squares in 4 ways, for example, as 183693674025 + 72157241641 = 428595^2 + 268621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 255850915666.

It is not an unprimeable number, because it can be changed into a prime (255850915667) 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, 930091 + ... + 1173358.

Almost surely, 2^255850915666 is an apocalyptic number.

255850915666 is a deficient number, since it is larger than the sum of its proper divisors (134608300934).

255850915666 is a wasteful number, since it uses less digits than its factorization.

255850915666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104509.

The product of its (nonzero) digits is 19440000, while the sum is 58.

The spelling of 255850915666 in words is "two hundred fifty-five billion, eight hundred fifty million, nine hundred fifteen thousand, six hundred sixty-six".