166413133 has 4 divisors (see below), whose sum is σ = 166612320. Its totient is φ = 166213948.

The previous prime is 166413113. The next prime is 166413167. The reversal of 166413133 is 331314661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 331314661 = 73 ⋅4538557.

It is a cyclic number.

It is not a de Polignac number, because 166413133 - 2⁵ = 166413101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166413113) 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, 98335 + ... + 100012.

It is an arithmetic number, because the mean of its divisors is an integer number (41653080).

Almost surely, 2^166413133 is an apocalyptic number.

It is an amenable number.

166413133 is a deficient number, since it is larger than the sum of its proper divisors (199187).

166413133 is an equidigital number, since it uses as much as digits as its factorization.

166413133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199186.

The product of its digits is 3888, while the sum is 28.

The square root of 166413133 is about 12900.1214335370. The cubic root of 166413133 is about 550.0420166248.

Adding to 166413133 its reverse (331314661), we get a palindrome (497727794).

The spelling of 166413133 in words is "one hundred sixty-six million, four hundred thirteen thousand, one hundred thirty-three".