55766664 has 64 divisors (see below), whose sum is σ = 164030400. Its totient is φ = 17494272.

The previous prime is 55766639. The next prime is 55766693. The reversal of 55766664 is 46666755.

55766664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (2562975).

Almost surely, 2^55766664 is an apocalyptic number.

55766664 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55766664 is an abundant number, since it is smaller than the sum of its proper divisors (108263736).

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

55766664 is a wasteful number, since it uses less digits than its factorization.

55766664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219 (or 15209 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 55766664 is about 7467.7080821360. The cubic root of 55766664 is about 382.0541209651.

Subtracting from 55766664 its reverse (46666755), we obtain a palindrome (9099909).

The spelling of 55766664 in words is "fifty-five million, seven hundred sixty-six thousand, six hundred sixty-four".