664005211 has 2 divisors, whose sum is σ = 664005212. Its totient is φ = 664005210.

The previous prime is 664005203. The next prime is 664005233. The reversal of 664005211 is 112500466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664005211 - 2³ = 664005203 is a prime.

It is not a weakly prime, because it can be changed into another prime (664005311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332002605 + 332002606.

It is an arithmetic number, because the mean of its divisors is an integer number (332002606).

Almost surely, 2^664005211 is an apocalyptic number.

664005211 is a deficient number, since it is larger than the sum of its proper divisors (1).

664005211 is an equidigital number, since it uses as much as digits as its factorization.

664005211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 664005211 is about 25768.2985662616. The cubic root of 664005211 is about 872.4164164888.

Adding to 664005211 its reverse (112500466), we get a palindrome (776505677).

The spelling of 664005211 in words is "six hundred sixty-four million, five thousand, two hundred eleven".