166233143 has 4 divisors (see below), whose sum is σ = 168337440. Its totient is φ = 164128848.

The previous prime is 166233139. The next prime is 166233163. The reversal of 166233143 is 341332661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166233143 - 2² = 166233139 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 (166233163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052030 + ... + 1052187.

It is an arithmetic number, because the mean of its divisors is an integer number (42084360).

Almost surely, 2^166233143 is an apocalyptic number.

166233143 is a deficient number, since it is larger than the sum of its proper divisors (2104297).

166233143 is an equidigital number, since it uses as much as digits as its factorization.

166233143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104296.

The product of its digits is 7776, while the sum is 29.

The square root of 166233143 is about 12893.1432552345. The cubic root of 166233143 is about 549.8436392986.

The spelling of 166233143 in words is "one hundred sixty-six million, two hundred thirty-three thousand, one hundred forty-three".