99107932661 has 4 divisors (see below), whose sum is σ = 99129638112. Its totient is φ = 99086227212.

The previous prime is 99107932657. The next prime is 99107932669. The reversal of 99107932661 is 16623970199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16623970199 = 23 ⋅722781313.

It is a cyclic number.

It is not a de Polignac number, because 99107932661 - 2² = 99107932657 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 (99107932669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10845875 + ... + 10855008.

It is an arithmetic number, because the mean of its divisors is an integer number (24782409528).

Almost surely, 2^99107932661 is an apocalyptic number.

It is an amenable number.

99107932661 is a deficient number, since it is larger than the sum of its proper divisors (21705451).

99107932661 is a wasteful number, since it uses less digits than its factorization.

99107932661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21705450.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 99107932661 in words is "ninety-nine billion, one hundred seven million, nine hundred thirty-two thousand, six hundred sixty-one".