99663911 has 16 divisors (see below), whose sum is σ = 112260960. Its totient is φ = 87920640.

The previous prime is 99663887. The next prime is 99663919. The reversal of 99663911 is 11936699.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99663911 - 2⁶ = 99663847 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 (99663919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29741 + ... + 32921.

It is an arithmetic number, because the mean of its divisors is an integer number (7016310).

Almost surely, 2^99663911 is an apocalyptic number.

99663911 is a deficient number, since it is larger than the sum of its proper divisors (12597049).

99663911 is a wasteful number, since it uses less digits than its factorization.

99663911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314.

The product of its digits is 78732, while the sum is 44.

The square root of 99663911 is about 9983.1814067460. The cubic root of 99663911 is about 463.6383040719.

The spelling of 99663911 in words is "ninety-nine million, six hundred sixty-three thousand, nine hundred eleven".