9900661100 has 36 divisors (see below), whose sum is σ = 23437567608. Its totient is φ = 3600240000.

The previous prime is 9900661097. The next prime is 9900661123. The reversal of 9900661100 is 11660099.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4499201 + ... + 4501400.

Almost surely, 2^9900661100 is an apocalyptic number.

It is an amenable number.

9900661100 is an abundant number, since it is smaller than the sum of its proper divisors (13536906508).

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

9900661100 is a wasteful number, since it uses less digits than its factorization.

9900661100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000626 (or 9000619 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9900661100 is about 99502.0658077007. The cubic root of 9900661100 is about 2147.2769636858.

The spelling of 9900661100 in words is "nine billion, nine hundred million, six hundred sixty-one thousand, one hundred".