166086091 has 2 divisors, whose sum is σ = 166086092. Its totient is φ = 166086090.

The previous prime is 166086077. The next prime is 166086097. The reversal of 166086091 is 190680661.

It is a strong prime.

It is an emirp because it is prime and its reverse (190680661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 160980991 and 199089061.

It is a cyclic number.

It is not a de Polignac number, because 166086091 - 2⁷ = 166085963 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166086091.

It is not a weakly prime, because it can be changed into another prime (166086097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83043045 + 83043046.

It is an arithmetic number, because the mean of its divisors is an integer number (83043046).

Almost surely, 2^166086091 is an apocalyptic number.

166086091 is a deficient number, since it is larger than the sum of its proper divisors (1).

166086091 is an equidigital number, since it uses as much as digits as its factorization.

166086091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 166086091 is about 12887.4392724078. The cubic root of 166086091 is about 549.6814585223.

The spelling of 166086091 in words is "one hundred sixty-six million, eighty-six thousand, ninety-one".