8643666996 has 36 divisors (see below), whose sum is σ = 21861420672. Its totient is φ = 2879619984.

The previous prime is 8643666971. The next prime is 8643667001. The reversal of 8643666996 is 6996663468.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226 + ... + 131481.

Almost surely, 2^8643666996 is an apocalyptic number.

It is an amenable number.

8643666996 is an abundant number, since it is smaller than the sum of its proper divisors (13217753676).

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

8643666996 is a wasteful number, since it uses less digits than its factorization.

8643666996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133540 (or 133535 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 63.

The square root of 8643666996 is about 92971.3235142966. The cubic root of 8643666996 is about 2052.2613947185.

The spelling of 8643666996 in words is "eight billion, six hundred forty-three million, six hundred sixty-six thousand, nine hundred ninety-six".