680777808 has 20 divisors (see below), whose sum is σ = 1758676128. Its totient is φ = 226925920.

The previous prime is 680777807. The next prime is 680777827. The reversal of 680777808 is 808777086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680777807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091388 + ... + 7091483.

Almost surely, 2^680777808 is an apocalyptic number.

It is an amenable number.

680777808 is an abundant number, since it is smaller than the sum of its proper divisors (1077898320).

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

680777808 is a wasteful number, since it uses less digits than its factorization.

680777808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182882 (or 14182876 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 51.

The square root of 680777808 is about 26091.7191461199. The cubic root of 680777808 is about 879.7010899406.

The spelling of 680777808 in words is "six hundred eighty million, seven hundred seventy-seven thousand, eight hundred eight".