680387865 has 8 divisors (see below), whose sum is σ = 1088620608. Its totient is φ = 362873520.

The previous prime is 680387843. The next prime is 680387971. The reversal of 680387865 is 568783086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680387865 - 2⁵ = 680387833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22679581 + ... + 22679610.

It is an arithmetic number, because the mean of its divisors is an integer number (136077576).

Almost surely, 2^680387865 is an apocalyptic number.

It is an amenable number.

680387865 is a deficient number, since it is larger than the sum of its proper divisors (408232743).

680387865 is a wasteful number, since it uses less digits than its factorization.

680387865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45359199.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 680387865 is about 26084.2455325049. The cubic root of 680387865 is about 879.5330964121.

The spelling of 680387865 in words is "six hundred eighty million, three hundred eighty-seven thousand, eight hundred sixty-five".