166237225 has 24 divisors (see below), whose sum is σ = 257001408. Its totient is φ = 103627200.

The previous prime is 166237219. The next prime is 166237229. The reversal of 166237225 is 522732661.

It is not a de Polignac number, because 166237225 - 2³ = 166237217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166237229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41254 + ... + 45103.

It is an arithmetic number, because the mean of its divisors is an integer number (10708392).

Almost surely, 2^166237225 is an apocalyptic number.

It is an amenable number.

166237225 is a deficient number, since it is larger than the sum of its proper divisors (90764183).

166237225 is a wasteful number, since it uses less digits than its factorization.

166237225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86385 (or 86380 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 166237225 is about 12893.3015554589. The cubic root of 166237225 is about 549.8481398921.

Adding to 166237225 its reverse (522732661), we get a palindrome (688969886).

The spelling of 166237225 in words is "one hundred sixty-six million, two hundred thirty-seven thousand, two hundred twenty-five".