55651005566 has 16 divisors (see below), whose sum is σ = 91129257744. Its totient is φ = 25333228224.

The previous prime is 55651005521. The next prime is 55651005589. The reversal of 55651005566 is 66550015655.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14658536 + ... + 14662331.

It is an arithmetic number, because the mean of its divisors is an integer number (5695578609).

Almost surely, 2^55651005566 is an apocalyptic number.

55651005566 is a deficient number, since it is larger than the sum of its proper divisors (35478252178).

55651005566 is a wasteful number, since it uses less digits than its factorization.

55651005566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320955.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 55651005566 in words is "fifty-five billion, six hundred fifty-one million, five thousand, five hundred sixty-six".