99525166691 has 4 divisors (see below), whose sum is σ = 99564367800. Its totient is φ = 99485965584.

The previous prime is 99525166651. The next prime is 99525166693. The reversal of 99525166691 is 19666152599.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99525166691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99525166691.

It is not an unprimeable number, because it can be changed into a prime (99525166693) 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 3 ways as a sum of consecutive naturals, for example, 19596746 + ... + 19601823.

It is an arithmetic number, because the mean of its divisors is an integer number (24891091950).

Almost surely, 2^99525166691 is an apocalyptic number.

99525166691 is a deficient number, since it is larger than the sum of its proper divisors (39201109).

99525166691 is a wasteful number, since it uses less digits than its factorization.

99525166691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39201108.

The product of its digits is 7873200, while the sum is 59.

The spelling of 99525166691 in words is "ninety-nine billion, five hundred twenty-five million, one hundred sixty-six thousand, six hundred ninety-one".