55660660 has 24 divisors (see below), whose sum is σ = 127514016. Its totient is φ = 20240160.

The previous prime is 55660607. The next prime is 55660681. The reversal of 55660660 is 6606655.

It is a congruent number.

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, 126282 + ... + 126721.

It is an arithmetic number, because the mean of its divisors is an integer number (5313084).

Almost surely, 2^55660660 is an apocalyptic number.

It is an amenable number.

55660660 is an abundant number, since it is smaller than the sum of its proper divisors (71853356).

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

55660660 is a wasteful number, since it uses less digits than its factorization.

55660660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253023 (or 253021 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 55660660 is about 7460.6072138935. The cubic root of 55660660 is about 381.8118917056.

It can be divided in two parts, 556 and 60660, that added together give a palindrome (61216).

The spelling of 55660660 in words is "fifty-five million, six hundred sixty thousand, six hundred sixty".