66264660017 has 2 divisors, whose sum is σ = 66264660018. Its totient is φ = 66264660016.

The previous prime is 66264660013. The next prime is 66264660031. The reversal of 66264660017 is 71006646266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33268300816 + 32996359201 = 182396^2 + 181649^2 .

It is a cyclic number.

It is not a de Polignac number, because 66264660017 - 2² = 66264660013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66264660017.

It is not a weakly prime, because it can be changed into another prime (66264660013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33132330008 + 33132330009.

It is an arithmetic number, because the mean of its divisors is an integer number (33132330009).

Almost surely, 2^66264660017 is an apocalyptic number.

It is an amenable number.

66264660017 is a deficient number, since it is larger than the sum of its proper divisors (1).

66264660017 is an equidigital number, since it uses as much as digits as its factorization.

66264660017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 66264660017 in words is "sixty-six billion, two hundred sixty-four million, six hundred sixty thousand, seventeen".