166291133 has 16 divisors (see below), whose sum is σ = 175073280. Its totient is φ = 157743936.

The previous prime is 166291117. The next prime is 166291183. The reversal of 166291133 is 331192661.

It is a cyclic number.

It is not a de Polignac number, because 166291133 - 2⁴ = 166291117 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 166291133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166291183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600191 + ... + 600467.

It is an arithmetic number, because the mean of its divisors is an integer number (10942080).

Almost surely, 2^166291133 is an apocalyptic number.

It is an amenable number.

166291133 is a deficient number, since it is larger than the sum of its proper divisors (8782147).

166291133 is a wasteful number, since it uses less digits than its factorization.

166291133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its digits is 5832, while the sum is 32.

The square root of 166291133 is about 12895.3919289024. The cubic root of 166291133 is about 549.9075690403.

The spelling of 166291133 in words is "one hundred sixty-six million, two hundred ninety-one thousand, one hundred thirty-three".