680618663 has 16 divisors (see below), whose sum is σ = 727099296. Its totient is φ = 636128640.

The previous prime is 680618657. The next prime is 680618683. The reversal of 680618663 is 366816086.

It is a cyclic number.

It is not a de Polignac number, because 680618663 - 2²⁴ = 663841447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680618623) 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, 93545 + ... + 100557.

It is an arithmetic number, because the mean of its divisors is an integer number (45443706).

Almost surely, 2^680618663 is an apocalyptic number.

680618663 is a deficient number, since it is larger than the sum of its proper divisors (46480633).

680618663 is a wasteful number, since it uses less digits than its factorization.

680618663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 680618663 is about 26088.6692454790. The cubic root of 680618663 is about 879.6325355415.

The spelling of 680618663 in words is "six hundred eighty million, six hundred eighteen thousand, six hundred sixty-three".