166135137 has 16 divisors (see below), whose sum is σ = 258326400. Its totient is φ = 94933776.

The previous prime is 166135129. The next prime is 166135139. The reversal of 166135137 is 731531661.

It is a happy number.

It is not a de Polignac number, because 166135137 - 2³ = 166135129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166135098 and 166135107.

It is not an unprimeable number, because it can be changed into a prime (166135139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79698 + ... + 81755.

It is an arithmetic number, because the mean of its divisors is an integer number (16145400).

Almost surely, 2^166135137 is an apocalyptic number.

It is an amenable number.

166135137 is a deficient number, since it is larger than the sum of its proper divisors (92191263).

166135137 is an equidigital number, since it uses as much as digits as its factorization.

166135137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161477 (or 161463 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 166135137 is about 12889.3419925146. The cubic root of 166135137 is about 549.7355610329.

Adding to 166135137 its reverse (731531661), we get a palindrome (897666798).

The spelling of 166135137 in words is "one hundred sixty-six million, one hundred thirty-five thousand, one hundred thirty-seven".