166205227 has 2 divisors, whose sum is σ = 166205228. Its totient is φ = 166205226.

The previous prime is 166205213. The next prime is 166205233. The reversal of 166205227 is 722502661.

166205227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166205227 - 2¹⁵ = 166172459 is a prime.

It is not a weakly prime, because it can be changed into another prime (166205287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83102613 + 83102614.

It is an arithmetic number, because the mean of its divisors is an integer number (83102614).

Almost surely, 2^166205227 is an apocalyptic number.

166205227 is a deficient number, since it is larger than the sum of its proper divisors (1).

166205227 is an equidigital number, since it uses as much as digits as its factorization.

166205227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 166205227 is about 12892.0606188460. The cubic root of 166205227 is about 549.8128586451.

Adding to 166205227 its reverse (722502661), we get a palindrome (888707888).

The spelling of 166205227 in words is "one hundred sixty-six million, two hundred five thousand, two hundred twenty-seven".