166544113 has 2 divisors, whose sum is σ = 166544114. Its totient is φ = 166544112.

The previous prime is 166544107. The next prime is 166544137. The reversal of 166544113 is 311445661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136819809 + 29724304 = 11697^2 + 5452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166544113 is a prime.

It is not a weakly prime, because it can be changed into another prime (169544113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83272056 + 83272057.

It is an arithmetic number, because the mean of its divisors is an integer number (83272057).

Almost surely, 2^166544113 is an apocalyptic number.

It is an amenable number.

166544113 is a deficient number, since it is larger than the sum of its proper divisors (1).

166544113 is an equidigital number, since it uses as much as digits as its factorization.

166544113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 166544113 is about 12905.1971313886. The cubic root of 166544113 is about 550.1862873098.

Adding to 166544113 its reverse (311445661), we get a palindrome (477989774).

The spelling of 166544113 in words is "one hundred sixty-six million, five hundred forty-four thousand, one hundred thirteen".