664626354223 has 8 divisors (see below), whose sum is σ = 729256203648. Its totient is φ = 601925754144.

The previous prime is 664626354191. The next prime is 664626354229. The reversal of 664626354223 is 322453626466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664626354223 - 2⁵ = 664626354191 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 (664626354229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482311615 + ... + 482312992.

It is an arithmetic number, because the mean of its divisors is an integer number (91157025456).

Almost surely, 2^664626354223 is an apocalyptic number.

664626354223 is a deficient number, since it is larger than the sum of its proper divisors (64629849425).

664626354223 is a wasteful number, since it uses less digits than its factorization.

664626354223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964624673.

The product of its digits is 7464960, while the sum is 49.

The spelling of 664626354223 in words is "six hundred sixty-four billion, six hundred twenty-six million, three hundred fifty-four thousand, two hundred twenty-three".