66075330257837 has 2 divisors, whose sum is σ = 66075330257838. Its totient is φ = 66075330257836.

The previous prime is 66075330257819. The next prime is 66075330257857. The reversal of 66075330257837 is 73875203357066.

66075330257837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65670504742756 + 404825515081 = 8103734^2 + 636259^2 .

It is a cyclic number.

It is not a de Polignac number, because 66075330257837 - 2¹⁸ = 66075329995693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66075330257837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66075330257857) 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, 33037665128918 + 33037665128919.

It is an arithmetic number, because the mean of its divisors is an integer number (33037665128919).

Almost surely, 2^{66075330257837} is an apocalyptic number.

It is an amenable number.

66075330257837 is a deficient number, since it is larger than the sum of its proper divisors (1).

66075330257837 is an equidigital number, since it uses as much as digits as its factorization.

66075330257837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 133358400, while the sum is 62.

The spelling of 66075330257837 in words is "sixty-six trillion, seventy-five billion, three hundred thirty million, two hundred fifty-seven thousand, eight hundred thirty-seven".