9998666668999 has 2 divisors, whose sum is σ = 9998666669000. Its totient is φ = 9998666668998.

The previous prime is 9998666668979. The next prime is 9998666669003.

9998666668999 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9998666668999 - 2¹¹ = 9998666666951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998666668919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999333334499 + 4999333334500.

It is an arithmetic number, because the mean of its divisors is an integer number (4999333334500).

Almost surely, 2^{9998666668999} is an apocalyptic number.

9998666668999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998666668999 is an equidigital number, since it uses as much as digits as its factorization.

9998666668999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264479053824, while the sum is 100.

The spelling of 9998666668999 in words is "nine trillion, nine hundred ninety-eight billion, six hundred sixty-six million, six hundred sixty-eight thousand, nine hundred ninety-nine".