166086269 has 2 divisors, whose sum is σ = 166086270. Its totient is φ = 166086268.

The previous prime is 166086247. The next prime is 166086287. The reversal of 166086269 is 962680661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126270169 + 39816100 = 11237^2 + 6310^2 .

It is an emirp because it is prime and its reverse (962680661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166086269 - 2²⁴ = 149309053 is a prime.

It is a super-2 number, since 2×166086269² = 55169297500680722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166080269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83043134 + 83043135.

It is an arithmetic number, because the mean of its divisors is an integer number (83043135).

Almost surely, 2^166086269 is an apocalyptic number.

It is an amenable number.

166086269 is a deficient number, since it is larger than the sum of its proper divisors (1).

166086269 is an equidigital number, since it uses as much as digits as its factorization.

166086269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 166086269 is about 12887.4461783551. The cubic root of 166086269 is about 549.6816548929.

The spelling of 166086269 in words is "one hundred sixty-six million, eighty-six thousand, two hundred sixty-nine".