16866841 has 4 divisors (see below), whose sum is σ = 16888500. Its totient is φ = 16845184.

The previous prime is 16866827. The next prime is 16866853. The reversal of 16866841 is 14866861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14866861 = 683 ⋅21767.

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 1625625 = 3904^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 16866841 - 2⁵ = 16866809 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16866794 and 16866803.

It is not an unprimeable number, because it can be changed into a prime (16866541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9616 + ... + 11233.

It is an arithmetic number, because the mean of its divisors is an integer number (4222125).

Almost surely, 2^16866841 is an apocalyptic number.

It is an amenable number.

16866841 is a deficient number, since it is larger than the sum of its proper divisors (21659).

16866841 is an equidigital number, since it uses as much as digits as its factorization.

16866841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21658.

The product of its digits is 55296, while the sum is 40.

The square root of 16866841 is about 4106.9259793670. The cubic root of 16866841 is about 256.4550469856.

The spelling of 16866841 in words is "sixteen million, eight hundred sixty-six thousand, eight hundred forty-one".