66459499 has 2 divisors, whose sum is σ = 66459500. Its totient is φ = 66459498.

The previous prime is 66459469. The next prime is 66459527. The reversal of 66459499 is 99495466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66459499 - 2²³ = 58070891 is a prime.

It is not a weakly prime, because it can be changed into another prime (66459469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33229749 + 33229750.

It is an arithmetic number, because the mean of its divisors is an integer number (33229750).

Almost surely, 2^66459499 is an apocalyptic number.

66459499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66459499 is an equidigital number, since it uses as much as digits as its factorization.

66459499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The square root of 66459499 is about 8152.2695612940. The cubic root of 66459499 is about 405.0596853560.

The spelling of 66459499 in words is "sixty-six million, four hundred fifty-nine thousand, four hundred ninety-nine".