66264660013 has 2 divisors, whose sum is σ = 66264660014. Its totient is φ = 66264660012.

The previous prime is 66264659921. The next prime is 66264660017. The reversal of 66264660013 is 31006646266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62311142884 + 3953517129 = 249622^2 + 62877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66264660013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66264660017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33132330006 + 33132330007.

It is an arithmetic number, because the mean of its divisors is an integer number (33132330007).

Almost surely, 2^66264660013 is an apocalyptic number.

It is an amenable number.

66264660013 is a deficient number, since it is larger than the sum of its proper divisors (1).

66264660013 is an equidigital number, since it uses as much as digits as its factorization.

66264660013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 66264660013 in words is "sixty-six billion, two hundred sixty-four million, six hundred sixty thousand, thirteen".