99656657099 has 4 divisors (see below), whose sum is σ = 99672169464. Its totient is φ = 99641144736.

The previous prime is 99656657077. The next prime is 99656657143. The reversal of 99656657099 is 99075665699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99656657099 - 2⁸ = 99656656843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99656657069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7746542 + ... + 7759395.

It is an arithmetic number, because the mean of its divisors is an integer number (24918042366).

Almost surely, 2^99656657099 is an apocalyptic number.

99656657099 is a deficient number, since it is larger than the sum of its proper divisors (15512365).

99656657099 is a wasteful number, since it uses less digits than its factorization.

99656657099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15512364.

The product of its (nonzero) digits is 248005800, while the sum is 71.

The spelling of 99656657099 in words is "ninety-nine billion, six hundred fifty-six million, six hundred fifty-seven thousand, ninety-nine".