8791966641 has 4 divisors (see below), whose sum is σ = 11722622192. Its totient is φ = 5861311092.

The previous prime is 8791966609. The next prime is 8791966681. The reversal of 8791966641 is 1466691978.

8791966641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8791966641 - 2⁵ = 8791966609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8791966681) 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 3 ways as a sum of consecutive naturals, for example, 1465327771 + ... + 1465327776.

It is an arithmetic number, because the mean of its divisors is an integer number (2930655548).

Almost surely, 2^8791966641 is an apocalyptic number.

It is an amenable number.

8791966641 is a deficient number, since it is larger than the sum of its proper divisors (2930655551).

8791966641 is a wasteful number, since it uses less digits than its factorization.

8791966641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930655550.

The product of its digits is 3919104, while the sum is 57.

The square root of 8791966641 is about 93765.4874727370. The cubic root of 8791966641 is about 2063.9318065606.

The spelling of 8791966641 in words is "eight billion, seven hundred ninety-one million, nine hundred sixty-six thousand, six hundred forty-one".