664535269 has 2 divisors, whose sum is σ = 664535270. Its totient is φ = 664535268.

The previous prime is 664535243. The next prime is 664535273. The reversal of 664535269 is 962535466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 598438369 + 66096900 = 24463^2 + 8130^2 .

It is a cyclic number.

It is not a de Polignac number, because 664535269 - 2⁵ = 664535237 is a prime.

It is a super-2 number, since 2×664535269² = 883214247489804722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664535299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332267634 + 332267635.

It is an arithmetic number, because the mean of its divisors is an integer number (332267635).

Almost surely, 2^664535269 is an apocalyptic number.

It is an amenable number.

664535269 is a deficient number, since it is larger than the sum of its proper divisors (1).

664535269 is an equidigital number, since it uses as much as digits as its factorization.

664535269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 46.

The square root of 664535269 is about 25778.5815940288. The cubic root of 664535269 is about 872.6484971507.

It can be divided in two parts, 6645 and 35269, that added together give a palindrome (41914).

The spelling of 664535269 in words is "six hundred sixty-four million, five hundred thirty-five thousand, two hundred sixty-nine".