680466656144 has 40 divisors (see below), whose sum is σ = 1438950981600. Its totient is φ = 309154227200.

The previous prime is 680466656143. The next prime is 680466656201. The reversal of 680466656144 is 441656664086.

It is a self number, because there is not a number n which added to its sum of digits gives 680466656144.

It is not an unprimeable number, because it can be changed into a prime (680466656143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562694 + ... + 1295205.

It is an arithmetic number, because the mean of its divisors is an integer number (35973774540).

Almost surely, 2^680466656144 is an apocalyptic number.

It is an amenable number.

680466656144 is an abundant number, since it is smaller than the sum of its proper divisors (758484325456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680466656144 is a wasteful number, since it uses less digits than its factorization.

680466656144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859999 (or 1859993 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 56.

The spelling of 680466656144 in words is "six hundred eighty billion, four hundred sixty-six million, six hundred fifty-six thousand, one hundred forty-four".