2166886 has 4 divisors (see below), whose sum is σ = 3250332. Its totient is φ = 1083442.

The previous prime is 2166877. The next prime is 2166917. The reversal of 2166886 is 6886612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541720 + ... + 541723.

It is an arithmetic number, because the mean of its divisors is an integer number (812583).

2^2166886 is an apocalyptic number.

2166886 is a deficient number, since it is larger than the sum of its proper divisors (1083446).

2166886 is a wasteful number, since it uses less digits than its factorization.

2166886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083445.

The product of its digits is 27648, while the sum is 37.

The square root of 2166886 is about 1472.0346463314. The cubic root of 2166886 is about 129.4033008482.

The spelling of 2166886 in words is "two million, one hundred sixty-six thousand, eight hundred eighty-six".