64666222223 has 2 divisors, whose sum is σ = 64666222224. Its totient is φ = 64666222222.

The previous prime is 64666222207. The next prime is 64666222241. The reversal of 64666222223 is 32222266646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64666222223 - 2⁴ = 64666222207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64666221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32333111111 + 32333111112.

It is an arithmetic number, because the mean of its divisors is an integer number (32333111112).

Almost surely, 2^64666222223 is an apocalyptic number.

64666222223 is a deficient number, since it is larger than the sum of its proper divisors (1).

64666222223 is an equidigital number, since it uses as much as digits as its factorization.

64666222223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 41.

Adding to 64666222223 its reverse (32222266646), we get a palindrome (96888488869).

The spelling of 64666222223 in words is "sixty-four billion, six hundred sixty-six million, two hundred twenty-two thousand, two hundred twenty-three".