166631113 has 16 divisors (see below), whose sum is σ = 191590272. Its totient is φ = 143440000.

The previous prime is 166631089. The next prime is 166631117. The reversal of 166631113 is 311136661.

It is a happy number.

It is not a de Polignac number, because 166631113 - 2²⁵ = 133076681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166631117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22293 + ... + 28813.

It is an arithmetic number, because the mean of its divisors is an integer number (11974392).

Almost surely, 2^166631113 is an apocalyptic number.

It is an amenable number.

166631113 is a deficient number, since it is larger than the sum of its proper divisors (24959159).

166631113 is a wasteful number, since it uses less digits than its factorization.

166631113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656.

The product of its digits is 1944, while the sum is 28.

The square root of 166631113 is about 12908.5674263258. The cubic root of 166631113 is about 550.2820734926.

Adding to 166631113 its reverse (311136661), we get a palindrome (477767774).

The spelling of 166631113 in words is "one hundred sixty-six million, six hundred thirty-one thousand, one hundred thirteen".