679881705 has 8 divisors (see below), whose sum is σ = 1087810752. Its totient is φ = 362603568.

The previous prime is 679881691. The next prime is 679881757. The reversal of 679881705 is 507188976.

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

It is not a de Polignac number, because 679881705 - 2¹⁰ = 679880681 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, 22662709 + ... + 22662738.

It is an arithmetic number, because the mean of its divisors is an integer number (135976344).

Almost surely, 2^679881705 is an apocalyptic number.

It is an amenable number.

679881705 is a deficient number, since it is larger than the sum of its proper divisors (407929047).

679881705 is a wasteful number, since it uses less digits than its factorization.

679881705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45325455.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 679881705 is about 26074.5413190721. The cubic root of 679881705 is about 879.3149390268.

The spelling of 679881705 in words is "six hundred seventy-nine million, eight hundred eighty-one thousand, seven hundred five".