166541423 has 8 divisors (see below), whose sum is σ = 169924608. Its totient is φ = 163167264.

The previous prime is 166541399. The next prime is 166541429. The reversal of 166541423 is 324145661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166541423 - 2⁶ = 166541359 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 166541423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166541429) 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 7 ways as a sum of consecutive naturals, for example, 44690 + ... + 48272.

It is an arithmetic number, because the mean of its divisors is an integer number (21240576).

Almost surely, 2^166541423 is an apocalyptic number.

166541423 is a deficient number, since it is larger than the sum of its proper divisors (3383185).

166541423 is an equidigital number, since it uses as much as digits as its factorization.

166541423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513.

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

The square root of 166541423 is about 12905.0929093905. The cubic root of 166541423 is about 550.1833251135.

The spelling of 166541423 in words is "one hundred sixty-six million, five hundred forty-one thousand, four hundred twenty-three".