55566066555 has 32 divisors (see below), whose sum is σ = 98860945920. Its totient is φ = 29612187360.

The previous prime is 55566066547. The next prime is 55566066593.

55566066555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55566066555 - 2³ = 55566066547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14874 + ... + 333696.

It is an arithmetic number, because the mean of its divisors is an integer number (3089404560).

Almost surely, 2^55566066555 is an apocalyptic number.

55566066555 is a deficient number, since it is larger than the sum of its proper divisors (43294879365).

55566066555 is a wasteful number, since it uses less digits than its factorization.

55566066555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320128 (or 320122 counting only the distinct ones).

The product of its (nonzero) digits is 20250000, while the sum is 54.

The spelling of 55566066555 in words is "fifty-five billion, five hundred sixty-six million, sixty-six thousand, five hundred fifty-five".