6628565055 has 64 divisors (see below), whose sum is σ = 12776924160. Its totient is φ = 2866627584.

The previous prime is 6628564973. The next prime is 6628565087. The reversal of 6628565055 is 5505658266.

It is a Cunningham number, because it is equal to 81416²-1.

It is not a de Polignac number, because 6628565055 - 2⁹ = 6628564543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6628564995 and 6628565013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1707777 + ... + 1711653.

It is an arithmetic number, because the mean of its divisors is an integer number (199639440).

Almost surely, 2^6628565055 is an apocalyptic number.

6628565055 is a deficient number, since it is larger than the sum of its proper divisors (6148359105).

6628565055 is a wasteful number, since it uses less digits than its factorization.

6628565055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The square root of 6628565055 is about 81415.9999938587. Note that the first 5 decimals coincide. The cubic root of 6628565055 is about 1878.4797063927.

The spelling of 6628565055 in words is "six billion, six hundred twenty-eight million, five hundred sixty-five thousand, fifty-five".