6628608138 has 32 divisors (see below), whose sum is σ = 13529704320. Its totient is φ = 2164518720.

The previous prime is 6628608121. The next prime is 6628608143. The reversal of 6628608138 is 8318068266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17328 + ... + 116436.

It is an arithmetic number, because the mean of its divisors is an integer number (422803260).

Almost surely, 2^6628608138 is an apocalyptic number.

6628608138 is an abundant number, since it is smaller than the sum of its proper divisors (6901096182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6628608138 is a wasteful number, since it uses less digits than its factorization.

6628608138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99342.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 6628608138 is about 81416.2645790139. The cubic root of 6628608138 is about 1878.4837761708.

The spelling of 6628608138 in words is "six billion, six hundred twenty-eight million, six hundred eight thousand, one hundred thirty-eight".