6640362680 has 64 divisors (see below), whose sum is σ = 17364672000. Its totient is φ = 2238102144.

The previous prime is 6640362679. The next prime is 6640362691. The reversal of 6640362680 is 862630466.

It is a congruent number.

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, 184460 + ... + 217499.

It is an arithmetic number, because the mean of its divisors is an integer number (271323000).

Almost surely, 2^6640362680 is an apocalyptic number.

It is an amenable number.

6640362680 is an abundant number, since it is smaller than the sum of its proper divisors (10724309320).

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

6640362680 is a wasteful number, since it uses less digits than its factorization.

6640362680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402036 (or 402032 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 6640362680 is about 81488.4205270908. The cubic root of 6640362680 is about 1879.5934951787.

The spelling of 6640362680 in words is "six billion, six hundred forty million, three hundred sixty-two thousand, six hundred eighty".