79680657 has 8 divisors (see below), whose sum is σ = 121418176. Its totient is φ = 45531792.

The previous prime is 79680613. The next prime is 79680659. The reversal of 79680657 is 75608697.

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

It is not a de Polignac number, because 79680657 - 2⁶ = 79680593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79680659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897138 + ... + 1897179.

It is an arithmetic number, because the mean of its divisors is an integer number (15177272).

Almost surely, 2^79680657 is an apocalyptic number.

It is an amenable number.

79680657 is a deficient number, since it is larger than the sum of its proper divisors (41737519).

79680657 is a wasteful number, since it uses less digits than its factorization.

79680657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794327.

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 79680657 is about 8926.4022427852. The cubic root of 79680657 is about 430.3128370667.

The spelling of 79680657 in words is "seventy-nine million, six hundred eighty thousand, six hundred fifty-seven".