8091990668 has 12 divisors (see below), whose sum is σ = 14162451072. Its totient is φ = 4045576080.

The previous prime is 8091990659. The next prime is 8091990689. The reversal of 8091990668 is 8660991908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59180 + ... + 140307.

It is an arithmetic number, because the mean of its divisors is an integer number (1180204256).

Almost surely, 2^8091990668 is an apocalyptic number.

It is an amenable number.

8091990668 is a deficient number, since it is larger than the sum of its proper divisors (6070460404).

8091990668 is a wasteful number, since it uses less digits than its factorization.

8091990668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209632 (or 209630 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 8091990668 is about 89955.4927061155. The cubic root of 8091990668 is about 2007.6366923512.

The spelling of 8091990668 in words is "eight billion, ninety-one million, nine hundred ninety thousand, six hundred sixty-eight".