6628565056 has 21 divisors (see below), whose sum is σ = 13154851389. Its totient is φ = 3313956864.

The previous prime is 6628564973. The next prime is 6628565087. The reversal of 6628565056 is 6505658266.

The square root of 6628565056 is 81416.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4361281600 + 2267283456 = 66040^2 + 47616^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 646240 + ... + 656416.

Almost surely, 2^6628565056 is an apocalyptic number.

6628565056 is the 81416-th square number.

It is an amenable number.

6628565056 is a deficient number, since it is larger than the sum of its proper divisors (6526286333).

6628565056 is an frugal number, since it uses more digits than its factorization.

6628565056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20366 (or 10179 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The cubic root of 6628565056 is about 1878.4797064872.

Multiplying 6628565056 by its sum of digits (49), we get a square (324799687744 = 569912²).

The spelling of 6628565056 in words is "six billion, six hundred twenty-eight million, five hundred sixty-five thousand, fifty-six".