8942191665 has 32 divisors (see below), whose sum is σ = 15675244416. Its totient is φ = 4316981760.

The previous prime is 8942191627. The next prime is 8942191669. The reversal of 8942191665 is 5661912498.

It is not a de Polignac number, because 8942191665 - 2⁷ = 8942191537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8942191669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77854 + ... + 154743.

It is an arithmetic number, because the mean of its divisors is an integer number (489851388).

Almost surely, 2^8942191665 is an apocalyptic number.

It is an amenable number.

8942191665 is a deficient number, since it is larger than the sum of its proper divisors (6733052751).

8942191665 is a wasteful number, since it uses less digits than its factorization.

8942191665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232849.

The product of its digits is 933120, while the sum is 51.

The square root of 8942191665 is about 94563.1623043561. The cubic root of 8942191665 is about 2075.6206912687.

The spelling of 8942191665 in words is "eight billion, nine hundred forty-two million, one hundred ninety-one thousand, six hundred sixty-five".