166441137 has 4 divisors (see below), whose sum is σ = 221921520. Its totient is φ = 110960756.

The previous prime is 166441117. The next prime is 166441141. The reversal of 166441137 is 731144661.

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 166441137 - 2²³ = 158052529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166441098 and 166441107.

It is not an unprimeable number, because it can be changed into a prime (166441117) 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, 27740187 + ... + 27740192.

It is an arithmetic number, because the mean of its divisors is an integer number (55480380).

Almost surely, 2^166441137 is an apocalyptic number.

It is an amenable number.

166441137 is a deficient number, since it is larger than the sum of its proper divisors (55480383).

166441137 is an equidigital number, since it uses as much as digits as its factorization.

166441137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55480382.

The product of its digits is 12096, while the sum is 33.

The square root of 166441137 is about 12901.2068040164. The cubic root of 166441137 is about 550.0728685823.

Adding to 166441137 its reverse (731144661), we get a palindrome (897585798).

The spelling of 166441137 in words is "one hundred sixty-six million, four hundred forty-one thousand, one hundred thirty-seven".