166445133 has 8 divisors (see below), whose sum is σ = 223524000. Its totient is φ = 110164848.

The previous prime is 166445101. The next prime is 166445161. The reversal of 166445133 is 331544661.

166445133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166445133 - 2⁵ = 166445101 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166445094 and 166445103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166445033) 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, 199158 + ... + 199991.

It is an arithmetic number, because the mean of its divisors is an integer number (27940500).

Almost surely, 2^166445133 is an apocalyptic number.

It is an amenable number.

166445133 is a deficient number, since it is larger than the sum of its proper divisors (57078867).

166445133 is a wasteful number, since it uses less digits than its factorization.

166445133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399291.

The product of its digits is 25920, while the sum is 33.

The square root of 166445133 is about 12901.3616723197. The cubic root of 166445133 is about 550.0772706863.

Adding to 166445133 its reverse (331544661), we get a palindrome (497989794).

The spelling of 166445133 in words is "one hundred sixty-six million, four hundred forty-five thousand, one hundred thirty-three".