166412243 has 4 divisors (see below), whose sum is σ = 166476600. Its totient is φ = 166347888.

The previous prime is 166412227. The next prime is 166412249. The reversal of 166412243 is 342214661.

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 166412243 - 2⁴ = 166412227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166412249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28130 + ... + 33527.

It is an arithmetic number, because the mean of its divisors is an integer number (41619150).

Almost surely, 2^166412243 is an apocalyptic number.

166412243 is a deficient number, since it is larger than the sum of its proper divisors (64357).

166412243 is an equidigital number, since it uses as much as digits as its factorization.

166412243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64356.

The product of its digits is 6912, while the sum is 29.

The square root of 166412243 is about 12900.0869376915. The cubic root of 166412243 is about 550.0410360566.

The spelling of 166412243 in words is "one hundred sixty-six million, four hundred twelve thousand, two hundred forty-three".