326666613 has 64 divisors (see below), whose sum is σ = 553900032. Its totient is φ = 166682880.

The previous prime is 326666597. The next prime is 326666629. The reversal of 326666613 is 316666623.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (326666597) and next prime (326666629).

It is not a de Polignac number, because 326666613 - 2⁴ = 326666597 is a prime.

It is a super-2 number, since 2×326666613² = 213422152097783538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326666633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1548078 + ... + 1548288.

It is an arithmetic number, because the mean of its divisors is an integer number (8654688).

Almost surely, 2^326666613 is an apocalyptic number.

It is an amenable number.

326666613 is a deficient number, since it is larger than the sum of its proper divisors (227233419).

326666613 is a wasteful number, since it uses less digits than its factorization.

326666613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its digits is 139968, while the sum is 39.

The square root of 326666613 is about 18073.9207976576. The cubic root of 326666613 is about 688.7076650494.

The spelling of 326666613 in words is "three hundred twenty-six million, six hundred sixty-six thousand, six hundred thirteen".