166541243 has 16 divisors (see below), whose sum is σ = 186278400. Its totient is φ = 147619680.

The previous prime is 166541227. The next prime is 166541267. The reversal of 166541243 is 342145661.

It is a cyclic number.

It is not a de Polignac number, because 166541243 - 2⁴ = 166541227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166541203) 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 15 ways as a sum of consecutive naturals, for example, 70973 + ... + 73281.

It is an arithmetic number, because the mean of its divisors is an integer number (11642400).

Almost surely, 2^166541243 is an apocalyptic number.

166541243 is a deficient number, since it is larger than the sum of its proper divisors (19737157).

166541243 is a wasteful number, since it uses less digits than its factorization.

166541243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482.

The product of its digits is 17280, while the sum is 32.

The square root of 166541243 is about 12905.0859353977. The cubic root of 166541243 is about 550.1831268985.

The spelling of 166541243 in words is "one hundred sixty-six million, five hundred forty-one thousand, two hundred forty-three".