6628564996 has 24 divisors (see below), whose sum is σ = 12285760536. Its totient is φ = 3118456320.

The previous prime is 6628564973. The next prime is 6628565087. The reversal of 6628564996 is 6994658266.

It can be written as a sum of positive squares in 4 ways, for example, as 5050092096 + 1578472900 = 71064^2 + 39730^2 .

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 7 ways as a sum of consecutive naturals, for example, 278310 + ... + 301186.

It is an arithmetic number, because the mean of its divisors is an integer number (511906689).

Almost surely, 2^6628564996 is an apocalyptic number.

It is an amenable number.

6628564996 is a deficient number, since it is larger than the sum of its proper divisors (5657195540).

6628564996 is a wasteful number, since it uses less digits than its factorization.

6628564996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27159 (or 27157 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 61.

The square root of 6628564996 is about 81415.9996315221. Note that the first 3 decimals coincide. The cubic root of 6628564996 is about 1878.4797008194.

It can be divided in two parts, 662 and 8564996, that added together give a palindrome (8565658).

The spelling of 6628564996 in words is "six billion, six hundred twenty-eight million, five hundred sixty-four thousand, nine hundred ninety-six".