664005311 has 2 divisors, whose sum is σ = 664005312. Its totient is φ = 664005310.

The previous prime is 664005301. The next prime is 664005317. The reversal of 664005311 is 113500466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664005311 - 2¹⁸ = 663743167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664005317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332002655 + 332002656.

It is an arithmetic number, because the mean of its divisors is an integer number (332002656).

Almost surely, 2^664005311 is an apocalyptic number.

664005311 is a deficient number, since it is larger than the sum of its proper divisors (1).

664005311 is an equidigital number, since it uses as much as digits as its factorization.

664005311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 664005311 is about 25768.3005066302. The cubic root of 664005311 is about 872.4164602845.

Adding to 664005311 its reverse (113500466), we get a palindrome (777505777).

The spelling of 664005311 in words is "six hundred sixty-four million, five thousand, three hundred eleven".