65566050000181 has 2 divisors, whose sum is σ = 65566050000182. Its totient is φ = 65566050000180.

The previous prime is 65566050000043. The next prime is 65566050000229. The reversal of 65566050000181 is 18100005066556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44949864345156 + 20616185655025 = 6704466^2 + 4540505^2 .

It is a cyclic number.

It is not a de Polignac number, because 65566050000181 - 2⁹ = 65566049999669 is a prime.

It is a super-2 number, since 2×65566050000181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65566050004181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32783025000090 + 32783025000091.

It is an arithmetic number, because the mean of its divisors is an integer number (32783025000091).

Almost surely, 2^{65566050000181} is an apocalyptic number.

It is an amenable number.

65566050000181 is a deficient number, since it is larger than the sum of its proper divisors (1).

65566050000181 is an equidigital number, since it uses as much as digits as its factorization.

65566050000181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 65566050000181 in words is "sixty-five trillion, five hundred sixty-six billion, fifty million, one hundred eighty-one", and thus it is an aban number.