166546223 has 16 divisors (see below), whose sum is σ = 174636000. Its totient is φ = 158699520.

The previous prime is 166546207. The next prime is 166546241. The reversal of 166546223 is 322645661.

It is a happy number.

It is not a de Polignac number, because 166546223 - 2⁴ = 166546207 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 (166546253) 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, 370703 + ... + 371151.

It is an arithmetic number, because the mean of its divisors is an integer number (10914750).

Almost surely, 2^166546223 is an apocalyptic number.

166546223 is a deficient number, since it is larger than the sum of its proper divisors (8089777).

166546223 is a wasteful number, since it uses less digits than its factorization.

166546223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its digits is 51840, while the sum is 35.

The square root of 166546223 is about 12905.2788811401. The cubic root of 166546223 is about 550.1886107946.

The spelling of 166546223 in words is "one hundred sixty-six million, five hundred forty-six thousand, two hundred twenty-three".