8166467809217 has 2 divisors, whose sum is σ = 8166467809218. Its totient is φ = 8166467809216.

The previous prime is 8166467809187. The next prime is 8166467809267. The reversal of 8166467809217 is 7129087646618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7038111867136 + 1128355942081 = 2652944^2 + 1062241^2 .

It is a cyclic number.

It is not a de Polignac number, because 8166467809217 - 2³⁴ = 8149287940033 is a prime.

It is a super-3 number, since 3×8166467809217³ (a number of 40 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8166467809267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4083233904608 + 4083233904609.

It is an arithmetic number, because the mean of its divisors is an integer number (4083233904609).

Almost surely, 2^{8166467809217} is an apocalyptic number.

It is an amenable number.

8166467809217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8166467809217 is an equidigital number, since it uses as much as digits as its factorization.

8166467809217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 8166467809217 in words is "eight trillion, one hundred sixty-six billion, four hundred sixty-seven million, eight hundred nine thousand, two hundred seventeen".