679858665 has 24 divisors (see below), whose sum is σ = 1148047488. Its totient is φ = 343504800.

The previous prime is 679858661. The next prime is 679858693. The reversal of 679858665 is 566858976.

It is not a de Polignac number, because 679858665 - 2² = 679858661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679858599 and 679858608.

It is not an unprimeable number, because it can be changed into a prime (679858661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57361 + ... + 68190.

It is an arithmetic number, because the mean of its divisors is an integer number (47835312).

Almost surely, 2^679858665 is an apocalyptic number.

It is an amenable number.

679858665 is a deficient number, since it is larger than the sum of its proper divisors (468188823).

679858665 is a wasteful number, since it uses less digits than its factorization.

679858665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125597 (or 125578 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

The square root of 679858665 is about 26074.0995050644. The cubic root of 679858665 is about 879.3050061002.

The spelling of 679858665 in words is "six hundred seventy-nine million, eight hundred fifty-eight thousand, six hundred sixty-five".