8591665980 has 48 divisors (see below), whose sum is σ = 24395503104. Its totient is φ = 2258840640.

The previous prime is 8591665949. The next prime is 8591665981. The reversal of 8591665980 is 895661958.

It is a self number, because there is not a number n which added to its sum of digits gives 8591665980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8591665981) 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, 1004152 + ... + 1012671.

It is an arithmetic number, because the mean of its divisors is an integer number (508239648).

Almost surely, 2^8591665980 is an apocalyptic number.

It is an amenable number.

8591665980 is an abundant number, since it is smaller than the sum of its proper divisors (15803837124).

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

8591665980 is a wasteful number, since it uses less digits than its factorization.

8591665980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016906 (or 2016904 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 57.

The square root of 8591665980 is about 92691.2400391752. The cubic root of 8591665980 is about 2048.1375891119.

The spelling of 8591665980 in words is "eight billion, five hundred ninety-one million, six hundred sixty-five thousand, nine hundred eighty".