55664872 has 32 divisors (see below), whose sum is σ = 108448200. Its totient is φ = 26763264.

The previous prime is 55664831. The next prime is 55664897. The reversal of 55664872 is 27846655.

It can be written as a sum of positive squares in 4 ways, for example, as 32103556 + 23561316 = 5666^2 + 4854^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25288 + ... + 27400.

Almost surely, 2^55664872 is an apocalyptic number.

It is an amenable number.

55664872 is a deficient number, since it is larger than the sum of its proper divisors (52783328).

55664872 is a wasteful number, since it uses less digits than its factorization.

55664872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2241 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 55664872 is about 7460.8894912068. The cubic root of 55664872 is about 381.8215223923.

The spelling of 55664872 in words is "fifty-five million, six hundred sixty-four thousand, eight hundred seventy-two".