55564664 has 16 divisors (see below), whose sum is σ = 109667400. Its totient is φ = 26320032.

The previous prime is 55564661. The next prime is 55564673. The reversal of 55564664 is 46646555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55564661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182627 + ... + 182930.

Almost surely, 2^55564664 is an apocalyptic number.

It is an amenable number.

55564664 is a deficient number, since it is larger than the sum of its proper divisors (54102736).

55564664 is a wasteful number, since it uses less digits than its factorization.

55564664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365582 (or 365578 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 55564664 is about 7454.1709129856. The cubic root of 55564664 is about 381.5922661771.

The spelling of 55564664 in words is "fifty-five million, five hundred sixty-four thousand, six hundred sixty-four".