9988665833 has 2 divisors, whose sum is σ = 9988665834. Its totient is φ = 9988665832.

The previous prime is 9988665821. The next prime is 9988665871. The reversal of 9988665833 is 3385668899.

It is a happy number.

9988665833 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9585780649 + 402885184 = 97907^2 + 20072^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988665833 - 2²⁰ = 9987617257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9988665833.

It is not a weakly prime, because it can be changed into another prime (9988665803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994332916 + 4994332917.

It is an arithmetic number, because the mean of its divisors is an integer number (4994332917).

Almost surely, 2^9988665833 is an apocalyptic number.

It is an amenable number.

9988665833 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988665833 is an equidigital number, since it uses as much as digits as its factorization.

9988665833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 65.

The square root of 9988665833 is about 99943.3130979757. The cubic root of 9988665833 is about 2153.6204249015.

The spelling of 9988665833 in words is "nine billion, nine hundred eighty-eight million, six hundred sixty-five thousand, eight hundred thirty-three".