680786579 has 6 divisors (see below), whose sum is σ = 742770684. Its totient is φ = 618818220.

The previous prime is 680786507. The next prime is 680786599. The reversal of 680786579 is 975687086.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-680786579 is a prime.

It is a super-2 number, since 2×680786579² = 926940732293046482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680786599) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82604 + ... + 90470.

It is an arithmetic number, because the mean of its divisors is an integer number (123795114).

Almost surely, 2^680786579 is an apocalyptic number.

680786579 is a deficient number, since it is larger than the sum of its proper divisors (61984105).

680786579 is an frugal number, since it uses more digits than its factorization.

680786579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15745 (or 7878 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The square root of 680786579 is about 26091.8872257259. The cubic root of 680786579 is about 879.7048678865.

The spelling of 680786579 in words is "six hundred eighty million, seven hundred eighty-six thousand, five hundred seventy-nine".