99166187709 has 32 divisors (see below), whose sum is σ = 147639024000. Its totient is φ = 65784362112.

The previous prime is 99166187647. The next prime is 99166187719. The reversal of 99166187709 is 90778166199.

99166187709 is a `hidden beast` number, since 9 + 9 + 1 + 6 + 618 + 7 + 7 + 0 + 9 = 666.

It is not a de Polignac number, because 99166187709 - 2¹¹ = 99166185661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99166187719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14458609 + ... + 14465465.

It is an arithmetic number, because the mean of its divisors is an integer number (4613719500).

Almost surely, 2^99166187709 is an apocalyptic number.

It is an amenable number.

99166187709 is a deficient number, since it is larger than the sum of its proper divisors (48472836291).

99166187709 is a wasteful number, since it uses less digits than its factorization.

99166187709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9434 (or 9428 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 63.

The spelling of 99166187709 in words is "ninety-nine billion, one hundred sixty-six million, one hundred eighty-seven thousand, seven hundred nine".