166202440545227 has 2 divisors, whose sum is σ = 166202440545228. Its totient is φ = 166202440545226.

The previous prime is 166202440545187. The next prime is 166202440545269. The reversal of 166202440545227 is 722545044202661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166202440545227 - 2⁸ = 166202440544971 is a prime.

It is not a weakly prime, because it can be changed into another prime (166202440544227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83101220272613 + 83101220272614.

It is an arithmetic number, because the mean of its divisors is an integer number (83101220272614).

Almost surely, 2^{166202440545227} is an apocalyptic number.

166202440545227 is a deficient number, since it is larger than the sum of its proper divisors (1).

166202440545227 is an equidigital number, since it uses as much as digits as its factorization.

166202440545227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6451200, while the sum is 50.

Adding to 166202440545227 its reverse (722545044202661), we get a palindrome (888747484747888).

The spelling of 166202440545227 in words is "one hundred sixty-six trillion, two hundred two billion, four hundred forty million, five hundred forty-five thousand, two hundred twenty-seven".