680742808 has 8 divisors (see below), whose sum is σ = 1276392780. Its totient is φ = 340371400.

The previous prime is 680742791. The next prime is 680742827. The reversal of 680742808 is 808247086.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42546418 + ... + 42546433.

Almost surely, 2^680742808 is an apocalyptic number.

It is an amenable number.

680742808 is a deficient number, since it is larger than the sum of its proper divisors (595649972).

680742808 is a wasteful number, since it uses less digits than its factorization.

680742808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85092857 (or 85092853 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 680742808 is about 26091.0484266156. The cubic root of 680742808 is about 879.6860140155.

The spelling of 680742808 in words is "six hundred eighty million, seven hundred forty-two thousand, eight hundred eight".