166442113 has 2 divisors, whose sum is σ = 166442114. Its totient is φ = 166442112.

The previous prime is 166442051. The next prime is 166442149. The reversal of 166442113 is 311244661.

166442113 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 can be written as a sum of positive squares in only one way, i.e., 149401729 + 17040384 = 12223^2 + 4128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166442113 is a prime.

It is equal to p_9315046 and since 166442113 and 9315046 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166442153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83221056 + 83221057.

It is an arithmetic number, because the mean of its divisors is an integer number (83221057).

Almost surely, 2^166442113 is an apocalyptic number.

It is an amenable number.

166442113 is a deficient number, since it is larger than the sum of its proper divisors (1).

166442113 is an equidigital number, since it uses as much as digits as its factorization.

166442113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 166442113 is about 12901.2446298797. The cubic root of 166442113 is about 550.0739437773.

Adding to 166442113 its reverse (311244661), we get a palindrome (477686774).

The spelling of 166442113 in words is "one hundred sixty-six million, four hundred forty-two thousand, one hundred thirteen".