2180166 has 8 divisors (see below), whose sum is σ = 4360344. Its totient is φ = 726720.

The previous prime is 2180159. The next prime is 2180173. The reversal of 2180166 is 6610812.

It is an interprime number because it is at equal distance from previous prime (2180159) and next prime (2180173).

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

2180166 is an admirable number.

It is an Ulam number.

It is a Curzon number.

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 in 3 ways as a sum of consecutive naturals, for example, 181675 + ... + 181686.

It is an arithmetic number, because the mean of its divisors is an integer number (545043).

2^2180166 is an apocalyptic number.

2180166 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.

2180166 is a wasteful number, since it uses less digits than its factorization.

2180166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363366.

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

The square root of 2180166 is about 1476.5385196465. The cubic root of 2180166 is about 129.6671167752.

Adding to 2180166 its reverse (6610812), we get a palindrome (8790978).

It can be divided in two parts, 2180 and 166, that added together give a triangular number (2346 = T₆₈).

The spelling of 2180166 in words is "two million, one hundred eighty thousand, one hundred sixty-six".