866511301201171 has 2 divisors, whose sum is σ = 866511301201172. Its totient is φ = 866511301201170.

The previous prime is 866511301201111. The next prime is 866511301201181. The reversal of 866511301201171 is 171102103115668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866511301201171 - 2¹⁷ = 866511301070099 is a prime.

It is not a weakly prime, because it can be changed into another prime (866511301201111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433255650600585 + 433255650600586.

It is an arithmetic number, because the mean of its divisors is an integer number (433255650600586).

Almost surely, 2^{866511301201171} is an apocalyptic number.

866511301201171 is a deficient number, since it is larger than the sum of its proper divisors (1).

866511301201171 is an equidigital number, since it uses as much as digits as its factorization.

866511301201171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 43.

The spelling of 866511301201171 in words is "eight hundred sixty-six trillion, five hundred eleven billion, three hundred one million, two hundred one thousand, one hundred seventy-one".