680000668 has 12 divisors (see below), whose sum is σ = 1190223720. Its totient is φ = 339936752.

The previous prime is 680000647. The next prime is 680000677. The reversal of 680000668 is 866000086.

It is a happy number.

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, 14718 + ... + 39706.

It is an arithmetic number, because the mean of its divisors is an integer number (99185310).

Almost surely, 2^680000668 is an apocalyptic number.

It is an amenable number.

680000668 is a deficient number, since it is larger than the sum of its proper divisors (510223052).

680000668 is a wasteful number, since it uses less digits than its factorization.

680000668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31796 (or 31794 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 680000668 is about 26076.8224291228. The cubic root of 680000668 is about 879.3662223808.

The spelling of 680000668 in words is "six hundred eighty million, six hundred sixty-eight", and thus it is an aban number.