6680390544 has 40 divisors (see below), whose sum is σ = 19175196320. Its totient is φ = 2226796704.

The previous prime is 6680390489. The next prime is 6680390569. The reversal of 6680390544 is 4450930866.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6680390544.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7731502 + ... + 7732365.

It is an arithmetic number, because the mean of its divisors is an integer number (479379908).

Almost surely, 2^6680390544 is an apocalyptic number.

It is an amenable number.

6680390544 is an abundant number, since it is smaller than the sum of its proper divisors (12494805776).

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

6680390544 is a wasteful number, since it uses less digits than its factorization.

6680390544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463884 (or 15463872 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6680390544 is about 81733.6561276932. The cubic root of 6680390544 is about 1883.3626388806.

The spelling of 6680390544 in words is "six billion, six hundred eighty million, three hundred ninety thousand, five hundred forty-four".