266516662171 has 2 divisors, whose sum is σ = 266516662172. Its totient is φ = 266516662170.

The previous prime is 266516662129. The next prime is 266516662187. The reversal of 266516662171 is 171266615662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266516662171 - 2¹⁵ = 266516629403 is a prime.

It is a super-2 number, since 2×266516662171² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266516662871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133258331085 + 133258331086.

It is an arithmetic number, because the mean of its divisors is an integer number (133258331086).

Almost surely, 2^266516662171 is an apocalyptic number.

266516662171 is a deficient number, since it is larger than the sum of its proper divisors (1).

266516662171 is an equidigital number, since it uses as much as digits as its factorization.

266516662171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 266516662171 in words is "two hundred sixty-six billion, five hundred sixteen million, six hundred sixty-two thousand, one hundred seventy-one".