55566664 has 16 divisors (see below), whose sum is σ = 106611120. Its totient is φ = 27137040.

The previous prime is 55566661. The next prime is 55566671. The reversal of 55566664 is 46666555.

55566664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 55566664.

It is not an unprimeable number, because it can be changed into a prime (55566661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 80422 + ... + 81109.

It is an arithmetic number, because the mean of its divisors is an integer number (6663195).

Almost surely, 2^55566664 is an apocalyptic number.

It is an amenable number.

55566664 is a deficient number, since it is larger than the sum of its proper divisors (51044456).

55566664 is a wasteful number, since it uses less digits than its factorization.

55566664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161580 (or 161576 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The square root of 55566664 is about 7454.3050648602. The cubic root of 55566664 is about 381.5968444787.

The spelling of 55566664 in words is "fifty-five million, five hundred sixty-six thousand, six hundred sixty-four".