326666623 has 12 divisors (see below), whose sum is σ = 340905664. Its totient is φ = 312696000.

The previous prime is 326666597. The next prime is 326666629.

326666623 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 326666623 - 2⁹ = 326666111 is a prime.

It is a super-2 number, since 2×326666623² = 213422165164448258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326666629) 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 in 11 ways as a sum of consecutive naturals, for example, 315715 + ... + 316747.

Almost surely, 2^326666623 is an apocalyptic number.

326666623 is a deficient number, since it is larger than the sum of its proper divisors (14239041).

326666623 is a wasteful number, since it uses less digits than its factorization.

326666623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1165 counting only the distinct ones).

The product of its digits is 279936, while the sum is 40.

The square root of 326666623 is about 18073.9210742993. The cubic root of 326666623 is about 688.7076720770.

The spelling of 326666623 in words is "three hundred twenty-six million, six hundred sixty-six thousand, six hundred twenty-three".