9099621660 has 96 divisors (see below), whose sum is σ = 25805908800. Its totient is φ = 2395514880.

The previous prime is 9099621649. The next prime is 9099621689. The reversal of 9099621660 is 661269909.

It is a happy number.

It is a super-2 number, since 2×9099621660² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 5451306 + ... + 5452974.

It is an arithmetic number, because the mean of its divisors is an integer number (268811550).

Almost surely, 2^9099621660 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 9099621660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12902954400).

9099621660 is an abundant number, since it is smaller than the sum of its proper divisors (16706287140).

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

9099621660 is a wasteful number, since it uses less digits than its factorization.

9099621660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791 (or 2789 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 9099621660 is about 95391.9370806569. The cubic root of 9099621660 is about 2087.7305448221.

The spelling of 9099621660 in words is "nine billion, ninety-nine million, six hundred twenty-one thousand, six hundred sixty".