9166635643 has 4 divisors (see below), whose sum is σ = 9999966168. Its totient is φ = 8333305120.

The previous prime is 9166635593. The next prime is 9166635679. The reversal of 9166635643 is 3465366619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9166635643 - 2⁹ = 9166635131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9166635343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416665246 + ... + 416665267.

It is an arithmetic number, because the mean of its divisors is an integer number (2499991542).

Almost surely, 2^9166635643 is an apocalyptic number.

9166635643 is a deficient number, since it is larger than the sum of its proper divisors (833330525).

9166635643 is a wasteful number, since it uses less digits than its factorization.

9166635643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833330524.

The product of its digits is 2099520, while the sum is 49.

The square root of 9166635643 is about 95742.5487596816. The cubic root of 9166635643 is about 2092.8430317285.

It can be divided in two parts, 9166 and 635643, that added together give a square (644809 = 803²).

The spelling of 9166635643 in words is "nine billion, one hundred sixty-six million, six hundred thirty-five thousand, six hundred forty-three".