55666563264 has 84 divisors (see below), whose sum is σ = 171831879856. Its totient is φ = 17128171008.

The previous prime is 55666563247. The next prime is 55666563319. The reversal of 55666563264 is 46236566655.

It is a self number, because there is not a number n which added to its sum of digits gives 55666563264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3709564 + ... + 3724539.

Almost surely, 2^55666563264 is an apocalyptic number.

It is an amenable number.

55666563264 is an abundant number, since it is smaller than the sum of its proper divisors (116165316592).

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

55666563264 is a wasteful number, since it uses less digits than its factorization.

55666563264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434134 (or 7434121 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 54.

The spelling of 55666563264 in words is "fifty-five billion, six hundred sixty-six million, five hundred sixty-three thousand, two hundred sixty-four".