680662766 has 16 divisors (see below), whose sum is σ = 1185980640. Its totient is φ = 286930080.

The previous prime is 680662757. The next prime is 680662793. The reversal of 680662766 is 667266086.

It is a self number, because there is not a number n which added to its sum of digits gives 680662766.

It is a congruent number.

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, 397661 + ... + 399368.

It is an arithmetic number, because the mean of its divisors is an integer number (74123790).

Almost surely, 2^680662766 is an apocalyptic number.

680662766 is a deficient number, since it is larger than the sum of its proper divisors (505317874).

680662766 is a wasteful number, since it uses less digits than its factorization.

680662766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797099.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 680662766 is about 26089.5144837921. The cubic root of 680662766 is about 879.6515347246.

The spelling of 680662766 in words is "six hundred eighty million, six hundred sixty-two thousand, seven hundred sixty-six".