664326133 has 2 divisors, whose sum is σ = 664326134. Its totient is φ = 664326132.

The previous prime is 664326041. The next prime is 664326137. The reversal of 664326133 is 331623466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626651089 + 37675044 = 25033^2 + 6138^2 .

It is a cyclic number.

It is not a de Polignac number, because 664326133 - 2⁹ = 664325621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664326137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332163066 + 332163067.

It is an arithmetic number, because the mean of its divisors is an integer number (332163067).

Almost surely, 2^664326133 is an apocalyptic number.

It is an amenable number.

664326133 is a deficient number, since it is larger than the sum of its proper divisors (1).

664326133 is an equidigital number, since it uses as much as digits as its factorization.

664326133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 34.

The square root of 664326133 is about 25774.5248840789. The cubic root of 664326133 is about 872.5569437634.

Adding to 664326133 its reverse (331623466), we get a palindrome (995949599).

The spelling of 664326133 in words is "six hundred sixty-four million, three hundred twenty-six thousand, one hundred thirty-three".