99331661 has 16 divisors (see below), whose sum is σ = 118117440. Its totient is φ = 82341120.

The previous prime is 99331649. The next prime is 99331669. The reversal of 99331661 is 16613399.

It is a cyclic number.

It is not a de Polignac number, because 99331661 - 2⁶ = 99331597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99331669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7685 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (7382340).

Almost surely, 2^99331661 is an apocalyptic number.

It is an amenable number.

99331661 is a deficient number, since it is larger than the sum of its proper divisors (18785779).

99331661 is a wasteful number, since it uses less digits than its factorization.

99331661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8476.

The product of its digits is 26244, while the sum is 38.

The square root of 99331661 is about 9966.5270280073. The cubic root of 99331661 is about 463.1225194996.

The spelling of 99331661 in words is "ninety-nine million, three hundred thirty-one thousand, six hundred sixty-one".