6640608008 has 16 divisors (see below), whose sum is σ = 12467259180. Its totient is φ = 3316005568.

The previous prime is 6640607969. The next prime is 6640608019. The reversal of 6640608008 is 8008060466.

It can be written as a sum of positive squares in 2 ways, for example, as 6043196644 + 597411364 = 77738^2 + 24442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530735 + ... + 543102.

Almost surely, 2^6640608008 is an apocalyptic number.

It is an amenable number.

6640608008 is a deficient number, since it is larger than the sum of its proper divisors (5826651172).

6640608008 is a wasteful number, since it uses less digits than its factorization.

6640608008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074616 (or 1074612 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 6640608008 is about 81489.9258068137. The cubic root of 6640608008 is about 1879.6166420687.

The spelling of 6640608008 in words is "six billion, six hundred forty million, six hundred eight thousand, eight".