16866873 has 28 divisors (see below), whose sum is σ = 26795988. Its totient is φ = 10575360.

The previous prime is 16866859. The next prime is 16866877. The reversal of 16866873 is 37866861.

It can be written as a sum of positive squares in 2 ways, for example, as 7884864 + 8982009 = 2808^2 + 2997^2 .

It is not a de Polignac number, because 16866873 - 2⁶ = 16866809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16866877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11713 + ... + 13073.

Almost surely, 2^16866873 is an apocalyptic number.

It is an amenable number.

16866873 is a deficient number, since it is larger than the sum of its proper divisors (9929115).

16866873 is an equidigital number, since it uses as much as digits as its factorization.

16866873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1381 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 16866873 is about 4106.9298752231. The cubic root of 16866873 is about 256.4552091688.

The spelling of 16866873 in words is "sixteen million, eight hundred sixty-six thousand, eight hundred seventy-three".