664579 has 2 divisors, whose sum is σ = 664580. Its totient is φ = 664578.

The previous prime is 664571. The next prime is 664583. The reversal of 664579 is 975466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664579 - 2³ = 664571 is a prime.

It is not a weakly prime, because it can be changed into another prime (664571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332289 + 332290.

It is an arithmetic number, because the mean of its divisors is an integer number (332290).

2⁶⁶⁴⁵⁷⁹ is an apocalyptic number.

664579 is a deficient number, since it is larger than the sum of its proper divisors (1).

664579 is an equidigital number, since it uses as much as digits as its factorization.

664579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 664579 is about 815.2171489855. The cubic root of 664579 is about 87.2667638826.

It can be divided in two parts, 66457 and 9, that added together give a palindrome (66466).

The spelling of 664579 in words is "six hundred sixty-four thousand, five hundred seventy-nine".