55775664 has 60 divisors (see below), whose sum is σ = 178396816. Its totient is φ = 15935616.

The previous prime is 55775651. The next prime is 55775689. The reversal of 55775664 is 46657755.

It is a super-2 number, since 2×55775664² = 6221849389281792, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 26659 + ... + 28674.

Almost surely, 2^55775664 is an apocalyptic number.

It is an amenable number.

55775664 is an abundant number, since it is smaller than the sum of its proper divisors (122621152).

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

55775664 is a wasteful number, since it uses less digits than its factorization.

55775664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55354 (or 55345 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 55775664 is about 7468.3106523497. The cubic root of 55775664 is about 382.0746726823.

The spelling of 55775664 in words is "fifty-five million, seven hundred seventy-five thousand, six hundred sixty-four".