166867423 has 4 divisors (see below), whose sum is σ = 166909680. Its totient is φ = 166825168.

The previous prime is 166867397. The next prime is 166867457. The reversal of 166867423 is 324768661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166867423 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 166867423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166867483) 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 3 ways as a sum of consecutive naturals, for example, 14515 + ... + 23332.

It is an arithmetic number, because the mean of its divisors is an integer number (41727420).

Almost surely, 2^166867423 is an apocalyptic number.

166867423 is a deficient number, since it is larger than the sum of its proper divisors (42257).

166867423 is an equidigital number, since it uses as much as digits as its factorization.

166867423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42256.

The product of its digits is 290304, while the sum is 43.

The square root of 166867423 is about 12917.7174067248. The cubic root of 166867423 is about 550.5420804256.

The spelling of 166867423 in words is "one hundred sixty-six million, eight hundred sixty-seven thousand, four hundred twenty-three".