64666222239 has 16 divisors (see below), whose sum is σ = 93687342080. Its totient is φ = 39524345280.

The previous prime is 64666222223. The next prime is 64666222241. The reversal of 64666222239 is 93222266646.

It is not a de Polignac number, because 64666222239 - 2⁴ = 64666222223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64666222289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18296542 + ... + 18300075.

It is an arithmetic number, because the mean of its divisors is an integer number (5855458880).

Almost surely, 2^64666222239 is an apocalyptic number.

64666222239 is a deficient number, since it is larger than the sum of its proper divisors (29021119841).

64666222239 is a wasteful number, since it uses less digits than its factorization.

64666222239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36596670.

The product of its digits is 2239488, while the sum is 48.

The spelling of 64666222239 in words is "sixty-four billion, six hundred sixty-six million, two hundred twenty-two thousand, two hundred thirty-nine".