8668320861 has 16 divisors (see below), whose sum is σ = 11599132160. Its totient is φ = 5758225200.

The previous prime is 8668320827. The next prime is 8668320943. The reversal of 8668320861 is 1680238668.

It is not a de Polignac number, because 8668320861 - 2⁶ = 8668320797 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8668320861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8668320461) 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 in 15 ways as a sum of consecutive naturals, for example, 1478586 + ... + 1484436.

It is an arithmetic number, because the mean of its divisors is an integer number (724945760).

Almost surely, 2^8668320861 is an apocalyptic number.

It is an amenable number.

8668320861 is a deficient number, since it is larger than the sum of its proper divisors (2930811299).

8668320861 is a wasteful number, since it uses less digits than its factorization.

8668320861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 8668320861 is about 93103.8176499761. The cubic root of 8668320861 is about 2054.2107273812.

The spelling of 8668320861 in words is "eight billion, six hundred sixty-eight million, three hundred twenty thousand, eight hundred sixty-one".