679864668 has 24 divisors (see below), whose sum is σ = 1812972672. Its totient is φ = 194247024.

The previous prime is 679864651. The next prime is 679864673. The reversal of 679864668 is 866468976.

It is a congruent number.

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, 4046730 + ... + 4046897.

It is an arithmetic number, because the mean of its divisors is an integer number (75540528).

Almost surely, 2^679864668 is an apocalyptic number.

It is an amenable number.

679864668 is an abundant number, since it is smaller than the sum of its proper divisors (1133108004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679864668 is a wasteful number, since it uses less digits than its factorization.

679864668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8093641 (or 8093639 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The square root of 679864668 is about 26074.2146190446. The cubic root of 679864668 is about 879.3075941148.

The spelling of 679864668 in words is "six hundred seventy-nine million, eight hundred sixty-four thousand, six hundred sixty-eight".