680559870 has 64 divisors (see below), whose sum is σ = 1702711296. Its totient is φ = 173923200.

The previous prime is 680559851. The next prime is 680559871. The reversal of 680559870 is 78955086.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680559871) 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 31 ways as a sum of consecutive naturals, for example, 69795 + ... + 78945.

It is an arithmetic number, because the mean of its divisors is an integer number (26604864).

Almost surely, 2^680559870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680559870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851355648).

680559870 is an abundant number, since it is smaller than the sum of its proper divisors (1022151426).

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

680559870 is a wasteful number, since it uses less digits than its factorization.

680559870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 680559870 is about 26087.5424292899. The cubic root of 680559870 is about 879.6072067597.

The spelling of 680559870 in words is "six hundred eighty million, five hundred fifty-nine thousand, eight hundred seventy".