680662806 has 12 divisors (see below), whose sum is σ = 1361453436. Its totient is φ = 226866300.

The previous prime is 680662793. The next prime is 680662811. The reversal of 680662806 is 608266086.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58581 + ... + 69231.

It is an arithmetic number, because the mean of its divisors is an integer number (113454453).

Almost surely, 2^680662806 is an apocalyptic number.

680662806 is an abundant number, since it is smaller than the sum of its proper divisors (680790630).

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

680662806 is an frugal number, since it uses more digits than its factorization.

680662806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21307 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 680662806 is about 26089.5152503836. The cubic root of 680662806 is about 879.6515519559.

The spelling of 680662806 in words is "six hundred eighty million, six hundred sixty-two thousand, eight hundred six".