680814668 has 12 divisors (see below), whose sum is σ = 1195667592. Its totient is φ = 339195360.

The previous prime is 680814647. The next prime is 680814679. The reversal of 680814668 is 866418086.

It is a super-2 number, since 2×680814668² = 927017224327900448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301730 + ... + 303977.

It is an arithmetic number, because the mean of its divisors is an integer number (99638966).

Almost surely, 2^680814668 is an apocalyptic number.

It is an amenable number.

680814668 is a deficient number, since it is larger than the sum of its proper divisors (514852924).

680814668 is a wasteful number, since it uses less digits than its factorization.

680814668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605992 (or 605990 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 680814668 is about 26092.4254909351. The cubic root of 680814668 is about 879.7169664849.

The spelling of 680814668 in words is "six hundred eighty million, eight hundred fourteen thousand, six hundred sixty-eight".