680909168 has 10 divisors (see below), whose sum is σ = 1319261544. Its totient is φ = 340454576.

The previous prime is 680909167. The next prime is 680909189. The reversal of 680909168 is 861909086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680909161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278396 + ... + 21278427.

Almost surely, 2^680909168 is an apocalyptic number.

It is an amenable number.

680909168 is a deficient number, since it is larger than the sum of its proper divisors (638352376).

680909168 is a wasteful number, since it uses less digits than its factorization.

680909168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42556831 (or 42556825 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 680909168 is about 26094.2362984625. The cubic root of 680909168 is about 879.7576674329.

The spelling of 680909168 in words is "six hundred eighty million, nine hundred nine thousand, one hundred sixty-eight".