55663880 has 16 divisors (see below), whose sum is σ = 125243820. Its totient is φ = 22265536.

The previous prime is 55663849. The next prime is 55663891. The reversal of 55663880 is 8836655.

It can be written as a sum of positive squares in 2 ways, for example, as 54081316 + 1582564 = 7354^2 + 1258^2 .

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 3 ways as a sum of consecutive naturals, for example, 695759 + ... + 695838.

Almost surely, 2^55663880 is an apocalyptic number.

It is an amenable number.

55663880 is an abundant number, since it is smaller than the sum of its proper divisors (69579940).

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

55663880 is a wasteful number, since it uses less digits than its factorization.

55663880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391608 (or 1391604 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 55663880 is about 7460.8230109017. The cubic root of 55663880 is about 381.8192542401.

The spelling of 55663880 in words is "fifty-five million, six hundred sixty-three thousand, eight hundred eighty".