55669864 has 16 divisors (see below), whose sum is σ = 106809120. Its totient is φ = 27187440.

The previous prime is 55669847. The next prime is 55669871. The reversal of 55669864 is 46896655.

It is a happy number.

It is a super-3 number, since 3×55669864³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80572 + ... + 81259.

It is an arithmetic number, because the mean of its divisors is an integer number (6675570).

Almost surely, 2^55669864 is an apocalyptic number.

It is an amenable number.

55669864 is a deficient number, since it is larger than the sum of its proper divisors (51139256).

55669864 is a wasteful number, since it uses less digits than its factorization.

55669864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161880 (or 161876 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 49.

The square root of 55669864 is about 7461.2240282677. The cubic root of 55669864 is about 381.8329359103.

The spelling of 55669864 in words is "fifty-five million, six hundred sixty-nine thousand, eight hundred sixty-four".