6628681572 has 36 divisors (see below), whose sum is σ = 15896286000. Its totient is φ = 2149837344.

The previous prime is 6628681523. The next prime is 6628681597. The reversal of 6628681572 is 2751868266.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185322 + ... + 218177.

It is an arithmetic number, because the mean of its divisors is an integer number (441563500).

Almost surely, 2^6628681572 is an apocalyptic number.

It is an amenable number.

6628681572 is an abundant number, since it is smaller than the sum of its proper divisors (9267604428).

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

6628681572 is a wasteful number, since it uses less digits than its factorization.

6628681572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403580 (or 403541 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 6628681572 is about 81416.7155564507. The cubic root of 6628681572 is about 1878.4907129749.

The spelling of 6628681572 in words is "six billion, six hundred twenty-eight million, six hundred eighty-one thousand, five hundred seventy-two".