664102223 has 2 divisors, whose sum is σ = 664102224. Its totient is φ = 664102222.

The previous prime is 664102211. The next prime is 664102249. The reversal of 664102223 is 322201466.

It is an a-pointer prime, because the next prime (664102249) can be obtained adding 664102223 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664102223 - 2¹⁰ = 664101199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664102192 and 664102201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664102423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332051111 + 332051112.

It is an arithmetic number, because the mean of its divisors is an integer number (332051112).

Almost surely, 2^664102223 is an apocalyptic number.

664102223 is a deficient number, since it is larger than the sum of its proper divisors (1).

664102223 is an equidigital number, since it uses as much as digits as its factorization.

664102223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 664102223 is about 25770.1808879953. The cubic root of 664102223 is about 872.4589014667.

Adding to 664102223 its reverse (322201466), we get a palindrome (986303689).

The spelling of 664102223 in words is "six hundred sixty-four million, one hundred two thousand, two hundred twenty-three".