664036223 has 2 divisors, whose sum is σ = 664036224. Its totient is φ = 664036222.

The previous prime is 664036211. The next prime is 664036237. The reversal of 664036223 is 322630466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664036223 - 2¹⁸ = 663774079 is a prime.

It is a super-2 number, since 2×664036223² = 881888210912211458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664036223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664036283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332018111 + 332018112.

It is an arithmetic number, because the mean of its divisors is an integer number (332018112).

Almost surely, 2^664036223 is an apocalyptic number.

664036223 is a deficient number, since it is larger than the sum of its proper divisors (1).

664036223 is an equidigital number, since it uses as much as digits as its factorization.

664036223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 664036223 is about 25768.9003063771. The cubic root of 664036223 is about 872.4299981878.

Adding to 664036223 its reverse (322630466), we get a palindrome (986666689).

The spelling of 664036223 in words is "six hundred sixty-four million, thirty-six thousand, two hundred twenty-three".