2166916 has 12 divisors (see below), whose sum is σ = 3808000. Its totient is φ = 1078920.

The previous prime is 2166877. The next prime is 2166917. The reversal of 2166916 is 6196612.

It is not an unprimeable number, because it can be changed into a prime (2166917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85 + ... + 2083.

2^2166916 is an apocalyptic number.

It is an amenable number.

2166916 is a deficient number, since it is larger than the sum of its proper divisors (1641084).

2166916 is a wasteful number, since it uses less digits than its factorization.

2166916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274 (or 2272 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 2166916 is about 1472.0448362737. The cubic root of 2166916 is about 129.4038980310.

It can be divided in two parts, 216 and 6916, that multiplied together give a triangular number (1493856 = T₁₇₂₈).

The spelling of 2166916 in words is "two million, one hundred sixty-six thousand, nine hundred sixteen".