9997665636 has 96 divisors (see below), whose sum is σ = 27449433088. Its totient is φ = 2772766080.

The previous prime is 9997665619. The next prime is 9997665641. The reversal of 9997665636 is 6365667999.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580266 + ... + 597246.

Almost surely, 2^9997665636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9997665636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13724716544).

9997665636 is an abundant number, since it is smaller than the sum of its proper divisors (17451767452).

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

9997665636 is a wasteful number, since it uses less digits than its factorization.

9997665636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17201 (or 17199 counting only the distinct ones).

The product of its digits is 99202320, while the sum is 66.

The square root of 9997665636 is about 99988.3274987636. The cubic root of 9997665636 is about 2154.2670358263.

The spelling of 9997665636 in words is "nine billion, nine hundred ninety-seven million, six hundred sixty-five thousand, six hundred thirty-six".