99966499 has 2 divisors, whose sum is σ = 99966500. Its totient is φ = 99966498.

The previous prime is 99966469. The next prime is 99966539. The reversal of 99966499 is 99466999.

It is a weak prime.

It is an emirp because it is prime and its reverse (99466999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99966499 - 2⁷ = 99966371 is a prime.

It is not a weakly prime, because it can be changed into another prime (99966469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983249 + 49983250.

It is an arithmetic number, because the mean of its divisors is an integer number (49983250).

Almost surely, 2^99966499 is an apocalyptic number.

99966499 is a deficient number, since it is larger than the sum of its proper divisors (1).

99966499 is an equidigital number, since it uses as much as digits as its factorization.

99966499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8503056, while the sum is 61.

The square root of 99966499 is about 9998.3248096869. The cubic root of 99966499 is about 464.1070449495.

Subtracting from 99966499 its reverse (99466999), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 99966499 in words is "ninety-nine million, nine hundred sixty-six thousand, four hundred ninety-nine".