166423854 has 24 divisors (see below), whose sum is σ = 342103608. Its totient is φ = 53972640.

The previous prime is 166423843. The next prime is 166423909. The reversal of 166423854 is 458324661.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1917 + ... + 18344.

It is an arithmetic number, because the mean of its divisors is an integer number (14254317).

Almost surely, 2^166423854 is an apocalyptic number.

166423854 is an abundant number, since it is smaller than the sum of its proper divisors (175679754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166423854 is a wasteful number, since it uses less digits than its factorization.

166423854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20340 (or 20303 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 166423854 is about 12900.5369655685. The cubic root of 166423854 is about 550.0538283405.

The spelling of 166423854 in words is "one hundred sixty-six million, four hundred twenty-three thousand, eight hundred fifty-four".