55520664 has 32 divisors (see below), whose sum is σ = 139579440. Its totient is φ = 18403200.

The previous prime is 55520639. The next prime is 55520669. The reversal of 55520664 is 46602555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55520669) 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, 2047 + ... + 10734.

Almost surely, 2^55520664 is an apocalyptic number.

It is an amenable number.

55520664 is an abundant number, since it is smaller than the sum of its proper divisors (84058776).

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

55520664 is a wasteful number, since it uses less digits than its factorization.

55520664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971 (or 12967 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 55520664 is about 7451.2189606802. The cubic root of 55520664 is about 381.4915157342.

The spelling of 55520664 in words is "fifty-five million, five hundred twenty thousand, six hundred sixty-four".