66912238313 has 2 divisors, whose sum is σ = 66912238314. Its totient is φ = 66912238312.

The previous prime is 66912238259. The next prime is 66912238397. The reversal of 66912238313 is 31383221966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66878097664 + 34140649 = 258608^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 66912238313 - 2⁶ = 66912238249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66912238513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33456119156 + 33456119157.

It is an arithmetic number, because the mean of its divisors is an integer number (33456119157).

Almost surely, 2^66912238313 is an apocalyptic number.

It is an amenable number.

66912238313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66912238313 is an equidigital number, since it uses as much as digits as its factorization.

66912238313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 44.

The spelling of 66912238313 in words is "sixty-six billion, nine hundred twelve million, two hundred thirty-eight thousand, three hundred thirteen".