2166806 has 8 divisors (see below), whose sum is σ = 3261720. Its totient is φ = 1079568.

The previous prime is 2166797. The next prime is 2166821. The reversal of 2166806 is 6086612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1151 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (407715).

2^2166806 is an apocalyptic number.

2166806 is a deficient number, since it is larger than the sum of its proper divisors (1094914).

2166806 is a wasteful number, since it uses less digits than its factorization.

2166806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2166806 is about 1472.0074728071. The cubic root of 2166806 is about 129.4017083338.

The spelling of 2166806 in words is "two million, one hundred sixty-six thousand, eight hundred six".