681466814668 has 12 divisors (see below), whose sum is σ = 1193744195280. Its totient is φ = 340397044592.

The previous prime is 681466814641. The next prime is 681466814711. The reversal of 681466814668 is 866418664186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84086128 + ... + 84094231.

It is an arithmetic number, because the mean of its divisors is an integer number (99478682940).

Almost surely, 2^681466814668 is an apocalyptic number.

It is an amenable number.

681466814668 is a deficient number, since it is larger than the sum of its proper divisors (512277380612).

681466814668 is a wasteful number, since it uses less digits than its factorization.

681466814668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168181376 (or 168181374 counting only the distinct ones).

The product of its digits is 63700992, while the sum is 64.

The spelling of 681466814668 in words is "six hundred eighty-one billion, four hundred sixty-six million, eight hundred fourteen thousand, six hundred sixty-eight".