8661168680 has 64 divisors (see below), whose sum is σ = 20043936000. Its totient is φ = 3365846784.

The previous prime is 8661168679. The next prime is 8661168727. The reversal of 8661168680 is 868611668.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089761 + ... + 1097679.

It is an arithmetic number, because the mean of its divisors is an integer number (313186500).

Almost surely, 2^8661168680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8661168680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10021968000).

8661168680 is an abundant number, since it is smaller than the sum of its proper divisors (11382767320).

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

8661168680 is a wasteful number, since it uses less digits than its factorization.

8661168680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8706 (or 8702 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 8661168680 is about 93065.4000152581. The cubic root of 8661168680 is about 2053.6455994936.

The spelling of 8661168680 in words is "eight billion, six hundred sixty-one million, one hundred sixty-eight thousand, six hundred eighty".