55661656 has 32 divisors (see below), whose sum is σ = 109461600. Its totient is φ = 26484480.

The previous prime is 55661629. The next prime is 55661699. The reversal of 55661656 is 65616655.

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, 41476 + ... + 42796.

It is an arithmetic number, because the mean of its divisors is an integer number (3420675).

Almost surely, 2^55661656 is an apocalyptic number.

It is an amenable number.

55661656 is a deficient number, since it is larger than the sum of its proper divisors (53799944).

55661656 is a wasteful number, since it uses less digits than its factorization.

55661656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579 (or 1575 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The square root of 55661656 is about 7460.6739641939. The cubic root of 55661656 is about 381.8141690913.

It can be divided in two parts, 5566 and 1656, that multiplied together give a square (9217296 = 3036²).

The spelling of 55661656 in words is "fifty-five million, six hundred sixty-one thousand, six hundred fifty-six".