16665873 has 32 divisors (see below), whose sum is σ = 26484480. Its totient is φ = 9123840.

The previous prime is 16665863. The next prime is 16665881. The reversal of 16665873 is 37856661.

It is not a de Polignac number, because 16665873 - 2⁵ = 16665841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16665833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69033 + ... + 69273.

It is an arithmetic number, because the mean of its divisors is an integer number (827640).

Almost surely, 2^16665873 is an apocalyptic number.

It is an amenable number.

16665873 is a deficient number, since it is larger than the sum of its proper divisors (9818607).

16665873 is a wasteful number, since it uses less digits than its factorization.

16665873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its digits is 181440, while the sum is 42.

The square root of 16665873 is about 4082.3856995634. The cubic root of 16665873 is about 255.4324227718.

The spelling of 16665873 in words is "sixteen million, six hundred sixty-five thousand, eight hundred seventy-three".