680781766684 has 12 divisors (see below), whose sum is σ = 1191378739824. Its totient is φ = 340387841024.

The previous prime is 680781766661. The next prime is 680781766699. The reversal of 680781766684 is 486667187086.

It is a congruent number.

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, 213349 + ... + 1186204.

It is an arithmetic number, because the mean of its divisors is an integer number (99281561652).

Almost surely, 2^680781766684 is an apocalyptic number.

It is an amenable number.

680781766684 is a deficient number, since it is larger than the sum of its proper divisors (510596973140).

680781766684 is a wasteful number, since it uses less digits than its factorization.

680781766684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521164 (or 1521162 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 67.

The spelling of 680781766684 in words is "six hundred eighty billion, seven hundred eighty-one million, seven hundred sixty-six thousand, six hundred eighty-four".