679216568 has 8 divisors (see below), whose sum is σ = 1273531080. Its totient is φ = 339608280.

The previous prime is 679216567. The next prime is 679216591. The reversal of 679216568 is 865612976.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×679216568² = 922670292491397248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679216567) 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 as a sum of consecutive naturals, namely, 42451028 + ... + 42451043.

It is an arithmetic number, because the mean of its divisors is an integer number (159191385).

Almost surely, 2^679216568 is an apocalyptic number.

It is an amenable number.

679216568 is a deficient number, since it is larger than the sum of its proper divisors (594314512).

679216568 is a wasteful number, since it uses less digits than its factorization.

679216568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84902077 (or 84902073 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 679216568 is about 26061.7836688128. The cubic root of 679216568 is about 879.0280971017.

The spelling of 679216568 in words is "six hundred seventy-nine million, two hundred sixteen thousand, five hundred sixty-eight".