99991866268 has 36 divisors (see below), whose sum is σ = 204088939600. Its totient is φ = 42848637216.

The previous prime is 99991866253. The next prime is 99991866283. The reversal of 99991866268 is 86266819999.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (99991866253) and next prime (99991866283).

It is a self number, because there is not a number n which added to its sum of digits gives 99991866268.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11708496 + ... + 11717032.

Almost surely, 2^99991866268 is an apocalyptic number.

99991866268 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

99991866268 is an abundant number, since it is smaller than the sum of its proper divisors (104097073332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99991866268 is an frugal number, since it uses more digits than its factorization.

99991866268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17099 (or 8546 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 73.

The spelling of 99991866268 in words is "ninety-nine billion, nine hundred ninety-one million, eight hundred sixty-six thousand, two hundred sixty-eight".