681334814668 has 12 divisors (see below), whose sum is σ = 1192514172472. Its totient is φ = 340616479680.

The previous prime is 681334814623. The next prime is 681334814681. The reversal of 681334814668 is 866418433186.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

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, 12701805 + ... + 12755332.

Almost surely, 2^681334814668 is an apocalyptic number.

It is an amenable number.

681334814668 is a deficient number, since it is larger than the sum of its proper divisors (511179357804).

681334814668 is a wasteful number, since it uses less digits than its factorization.

681334814668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25463832 (or 25463830 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 58.

The spelling of 681334814668 in words is "six hundred eighty-one billion, three hundred thirty-four million, eight hundred fourteen thousand, six hundred sixty-eight".