66664326213 has 24 divisors (see below), whose sum is σ = 99937140576. Its totient is φ = 44408250000.

The previous prime is 66664326173. The next prime is 66664326217. The reversal of 66664326213 is 31262346666.

It is not a de Polignac number, because 66664326213 - 2⁸ = 66664325957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66664326217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207463 + ... + 419963.

It is an arithmetic number, because the mean of its divisors is an integer number (4164047524).

Almost surely, 2^66664326213 is an apocalyptic number.

It is an amenable number.

66664326213 is a deficient number, since it is larger than the sum of its proper divisors (33272814363).

66664326213 is a wasteful number, since it uses less digits than its factorization.

66664326213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213807 (or 213795 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The spelling of 66664326213 in words is "sixty-six billion, six hundred sixty-four million, three hundred twenty-six thousand, two hundred thirteen".