680672865 has 8 divisors (see below), whose sum is σ = 1089076608. Its totient is φ = 363025520.

The previous prime is 680672851. The next prime is 680672869. The reversal of 680672865 is 568276086.

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

It is not a de Polignac number, because 680672865 - 2⁷ = 680672737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680672869) 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 7 ways as a sum of consecutive naturals, for example, 22689081 + ... + 22689110.

It is an arithmetic number, because the mean of its divisors is an integer number (136134576).

Almost surely, 2^680672865 is an apocalyptic number.

It is an amenable number.

680672865 is a deficient number, since it is larger than the sum of its proper divisors (408403743).

680672865 is a wasteful number, since it uses less digits than its factorization.

680672865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45378199.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 680672865 is about 26089.7080282628. The cubic root of 680672865 is about 879.6558851692.

The spelling of 680672865 in words is "six hundred eighty million, six hundred seventy-two thousand, eight hundred sixty-five".