16664579 has 2 divisors, whose sum is σ = 16664580. Its totient is φ = 16664578.

The previous prime is 16664563. The next prime is 16664587. The reversal of 16664579 is 97546661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16664579 - 2⁴ = 16664563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16664519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332289 + 8332290.

It is an arithmetic number, because the mean of its divisors is an integer number (8332290).

Almost surely, 2^16664579 is an apocalyptic number.

16664579 is a deficient number, since it is larger than the sum of its proper divisors (1).

16664579 is an equidigital number, since it uses as much as digits as its factorization.

16664579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 16664579 is about 4082.2272107270. The cubic root of 16664579 is about 255.4258116948.

The spelling of 16664579 in words is "sixteen million, six hundred sixty-four thousand, five hundred seventy-nine".