166159237 has 4 divisors (see below), whose sum is σ = 174904480. Its totient is φ = 157413996.

The previous prime is 166159211. The next prime is 166159247. The reversal of 166159237 is 732951661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166159237 - 2⁷ = 166159109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166159237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166159247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4372593 + ... + 4372630.

It is an arithmetic number, because the mean of its divisors is an integer number (43726120).

Almost surely, 2^166159237 is an apocalyptic number.

It is an amenable number.

166159237 is a deficient number, since it is larger than the sum of its proper divisors (8745243).

166159237 is an equidigital number, since it uses as much as digits as its factorization.

166159237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8745242.

The product of its digits is 68040, while the sum is 40.

The square root of 166159237 is about 12890.2768395407. The cubic root of 166159237 is about 549.7621417765.

It can be divided in two parts, 16615 and 9237, that added together give a palindrome (25852).

The spelling of 166159237 in words is "one hundred sixty-six million, one hundred fifty-nine thousand, two hundred thirty-seven".