6640369672 has 16 divisors (see below), whose sum is σ = 12476266560. Its totient is φ = 3313365264.

The previous prime is 6640369661. The next prime is 6640369741. The reversal of 6640369672 is 2769630466.

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, 848308 + ... + 856099.

It is an arithmetic number, because the mean of its divisors is an integer number (779766660).

Almost surely, 2^6640369672 is an apocalyptic number.

It is an amenable number.

6640369672 is a deficient number, since it is larger than the sum of its proper divisors (5835896888).

6640369672 is a wasteful number, since it uses less digits than its factorization.

6640369672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704900 (or 1704896 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

The square root of 6640369672 is about 81488.4634288805. The cubic root of 6640369672 is about 1879.5941548873.

The spelling of 6640369672 in words is "six billion, six hundred forty million, three hundred sixty-nine thousand, six hundred seventy-two".