166412227 has 2 divisors, whose sum is σ = 166412228. Its totient is φ = 166412226.

The previous prime is 166412221. The next prime is 166412249. The reversal of 166412227 is 722214661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166412227 - 2³ = 166412219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166412221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83206113 + 83206114.

It is an arithmetic number, because the mean of its divisors is an integer number (83206114).

Almost surely, 2^166412227 is an apocalyptic number.

166412227 is a deficient number, since it is larger than the sum of its proper divisors (1).

166412227 is an equidigital number, since it uses as much as digits as its factorization.

166412227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 166412227 is about 12900.0863175407. The cubic root of 166412227 is about 550.0410184284.

Adding to 166412227 its reverse (722214661), we get a palindrome (888626888).

The spelling of 166412227 in words is "one hundred sixty-six million, four hundred twelve thousand, two hundred twenty-seven".