680921657833 has 16 divisors (see below), whose sum is σ = 728757388800. Its totient is φ = 634644440320.

The previous prime is 680921657749. The next prime is 680921657851. The reversal of 680921657833 is 338756129086.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680921657833 is a prime.

It is a super-2 number, since 2×680921657833² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680921657863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316608 + ... + 1209166.

It is an arithmetic number, because the mean of its divisors is an integer number (45547336800).

Almost surely, 2^680921657833 is an apocalyptic number.

It is an amenable number.

680921657833 is a deficient number, since it is larger than the sum of its proper divisors (47835730967).

680921657833 is a wasteful number, since it uses less digits than its factorization.

680921657833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893432.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 680921657833 in words is "six hundred eighty billion, nine hundred twenty-one million, six hundred fifty-seven thousand, eight hundred thirty-three".