9666649900 has 36 divisors (see below), whose sum is σ = 20986321720. Its totient is φ = 3864873600.

The previous prime is 9666649879. The next prime is 9666649901. The reversal of 9666649900 is 99466669.

It is not an unprimeable number, because it can be changed into a prime (9666649901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206911 + ... + 249289.

Almost surely, 2^9666649900 is an apocalyptic number.

It is an amenable number.

9666649900 is an abundant number, since it is smaller than the sum of its proper divisors (11319671820).

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

9666649900 is a wasteful number, since it uses less digits than its factorization.

9666649900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44674 (or 44667 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 55.

The square root of 9666649900 is about 98319.1227584950. The cubic root of 9666649900 is about 2130.2242778526.

The spelling of 9666649900 in words is "nine billion, six hundred sixty-six million, six hundred forty-nine thousand, nine hundred".