9990970866 has 16 divisors (see below), whose sum is σ = 22202157600. Its totient is φ = 3330323604.

The previous prime is 9990970859. The next prime is 9990970877. The reversal of 9990970866 is 6680790999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92508936 + ... + 92509043.

It is an arithmetic number, because the mean of its divisors is an integer number (1387634850).

Almost surely, 2^9990970866 is an apocalyptic number.

9990970866 is an abundant number, since it is smaller than the sum of its proper divisors (12211186734).

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

9990970866 is a wasteful number, since it uses less digits than its factorization.

9990970866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185017990 (or 185017984 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The square root of 9990970866 is about 99954.8441347392. The cubic root of 9990970866 is about 2153.7860721271.

The spelling of 9990970866 in words is "nine billion, nine hundred ninety million, nine hundred seventy thousand, eight hundred sixty-six".