9996659 has 2 divisors, whose sum is σ = 9996660. Its totient is φ = 9996658.

The previous prime is 9996647. The next prime is 9996667. The reversal of 9996659 is 9566999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9996659 - 2¹⁶ = 9931123 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9996659.

It is not a weakly prime, because it can be changed into another prime (9996059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998329 + 4998330.

It is an arithmetic number, because the mean of its divisors is an integer number (4998330).

Almost surely, 2^9996659 is an apocalyptic number.

9996659 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996659 is an equidigital number, since it uses as much as digits as its factorization.

9996659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1180980, while the sum is 53.

The square root of 9996659 is about 3161.7493575551. The cubic root of 9996659 is about 215.4194731096.

The spelling of 9996659 in words is "nine million, nine hundred ninety-six thousand, six hundred fifty-nine".