99666443 has 2 divisors, whose sum is σ = 99666444. Its totient is φ = 99666442.

The previous prime is 99666407. The next prime is 99666451. The reversal of 99666443 is 34466699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99666443 - 2⁶ = 99666379 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99666403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49833221 + 49833222.

It is an arithmetic number, because the mean of its divisors is an integer number (49833222).

Almost surely, 2^99666443 is an apocalyptic number.

99666443 is a deficient number, since it is larger than the sum of its proper divisors (1).

99666443 is an equidigital number, since it uses as much as digits as its factorization.

99666443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The square root of 99666443 is about 9983.3082192227. The cubic root of 99666443 is about 463.6422303418.

The spelling of 99666443 in words is "ninety-nine million, six hundred sixty-six thousand, four hundred forty-three".