680606568 has 96 divisors (see below), whose sum is σ = 1934150400. Its totient is φ = 215913600.

The previous prime is 680606561. The next prime is 680606617. The reversal of 680606568 is 865606086.

680606568 is a `hidden beast` number, since 6 + 80 + 6 + 0 + 6 + 568 = 666.

It is not an unprimeable number, because it can be changed into a prime (680606561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145953 + ... + 150543.

It is an arithmetic number, because the mean of its divisors is an integer number (20147400).

Almost surely, 2^680606568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680606568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967075200).

680606568 is an abundant number, since it is smaller than the sum of its proper divisors (1253543832).

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

680606568 is a wasteful number, since it uses less digits than its factorization.

680606568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 680606568 is about 26088.4374388349. The cubic root of 680606568 is about 879.6273249789.

The spelling of 680606568 in words is "six hundred eighty million, six hundred six thousand, five hundred sixty-eight".