6686980764 has 48 divisors (see below), whose sum is σ = 16519198080. Its totient is φ = 2099459520.

The previous prime is 6686980759. The next prime is 6686980777. The reversal of 6686980764 is 4670896866.

It is a junction number, because it is equal to n+sod(n) for n = 6686980698 and 6686980707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45322 + ... + 124209.

It is an arithmetic number, because the mean of its divisors is an integer number (344149960).

Almost surely, 2^6686980764 is an apocalyptic number.

It is an amenable number.

6686980764 is an abundant number, since it is smaller than the sum of its proper divisors (9832217316).

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

6686980764 is a wasteful number, since it uses less digits than its factorization.

6686980764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169730 (or 169728 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The square root of 6686980764 is about 81773.9614058167. The cubic root of 6686980764 is about 1883.9817491392.

The spelling of 6686980764 in words is "six billion, six hundred eighty-six million, nine hundred eighty thousand, seven hundred sixty-four".