166345133 has 8 divisors (see below), whose sum is σ = 175771200. Its totient is φ = 156986208.

The previous prime is 166345129. The next prime is 166345139. The reversal of 166345133 is 331543661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166345133 - 2² = 166345129 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 166345133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166345139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11648 + ... + 21641.

It is an arithmetic number, because the mean of its divisors is an integer number (21971400).

Almost surely, 2^166345133 is an apocalyptic number.

It is an amenable number.

166345133 is a deficient number, since it is larger than the sum of its proper divisors (9426067).

166345133 is a wasteful number, since it uses less digits than its factorization.

166345133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33571.

The product of its digits is 19440, while the sum is 32.

The square root of 166345133 is about 12897.4855301334. The cubic root of 166345133 is about 549.9670867357.

Adding to 166345133 its reverse (331543661), we get a palindrome (497888794).

The spelling of 166345133 in words is "one hundred sixty-six million, three hundred forty-five thousand, one hundred thirty-three".