99666403 has 2 divisors, whose sum is σ = 99666404. Its totient is φ = 99666402.

The previous prime is 99666397. The next prime is 99666407. The reversal of 99666403 is 30466699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99666403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99666403.

It is not a weakly prime, because it can be changed into another prime (99666407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49833201 + 49833202.

It is an arithmetic number, because the mean of its divisors is an integer number (49833202).

Almost surely, 2^99666403 is an apocalyptic number.

99666403 is a deficient number, since it is larger than the sum of its proper divisors (1).

99666403 is an equidigital number, since it uses as much as digits as its factorization.

99666403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 99666403 is about 9983.3062158786. The cubic root of 99666403 is about 463.6421683159.

The spelling of 99666403 in words is "ninety-nine million, six hundred sixty-six thousand, four hundred three".