66200740717 has 2 divisors, whose sum is σ = 66200740718. Its totient is φ = 66200740716.

The previous prime is 66200740699. The next prime is 66200740751. The reversal of 66200740717 is 71704700266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40921648681 + 25279092036 = 202291^2 + 158994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66200740717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66200740717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66260740717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100370358 + 33100370359.

It is an arithmetic number, because the mean of its divisors is an integer number (33100370359).

Almost surely, 2^66200740717 is an apocalyptic number.

It is an amenable number.

66200740717 is a deficient number, since it is larger than the sum of its proper divisors (1).

66200740717 is an equidigital number, since it uses as much as digits as its factorization.

66200740717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 66200740717 in words is "sixty-six billion, two hundred million, seven hundred forty thousand, seven hundred seventeen".