664225459 has 2 divisors, whose sum is σ = 664225460. Its totient is φ = 664225458.

The previous prime is 664225453. The next prime is 664225477. The reversal of 664225459 is 954522466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664225459 - 2⁹ = 664224947 is a prime.

It is not a weakly prime, because it can be changed into another prime (664225453) 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, 332112729 + 332112730.

It is an arithmetic number, because the mean of its divisors is an integer number (332112730).

Almost surely, 2^664225459 is an apocalyptic number.

664225459 is a deficient number, since it is larger than the sum of its proper divisors (1).

664225459 is an equidigital number, since it uses as much as digits as its factorization.

664225459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 43.

The square root of 664225459 is about 25772.5718351894. The cubic root of 664225459 is about 872.5128648935.

The spelling of 664225459 in words is "six hundred sixty-four million, two hundred twenty-five thousand, four hundred fifty-nine".