55663660816 has 20 divisors (see below), whose sum is σ = 107959901632. Its totient is φ = 27803041056.

The previous prime is 55663660757. The next prime is 55663660837. The reversal of 55663660816 is 61806636655.

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, 1783380 + ... + 1814323.

Almost surely, 2^55663660816 is an apocalyptic number.

It is an amenable number.

55663660816 is a deficient number, since it is larger than the sum of its proper divisors (52296240816).

55663660816 is a wasteful number, since it uses less digits than its factorization.

55663660816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598678 (or 3598672 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 55663660816 in words is "fifty-five billion, six hundred sixty-three million, six hundred sixty thousand, eight hundred sixteen".