2166018 has 8 divisors (see below), whose sum is σ = 4332048. Its totient is φ = 722004.

The previous prime is 2166007. The next prime is 2166023. The reversal of 2166018 is 8106612.

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

2166018 is an admirable 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, 180496 + ... + 180507.

It is an arithmetic number, because the mean of its divisors is an integer number (541506).

2^2166018 is an apocalyptic number.

2166018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166018 is a wasteful number, since it uses less digits than its factorization.

2166018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361008.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2166018 is about 1471.7397867830. The cubic root of 2166018 is about 129.3860199719.

The spelling of 2166018 in words is "two million, one hundred sixty-six thousand, eighteen".