2066181 has 16 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 1229760.

The previous prime is 2066179. The next prime is 2066201. The reversal of 2066181 is 1816602.

It is not a de Polignac number, because 2066181 - 2¹ = 2066179 is a prime.

It is a super-2 number, since 2×2066181² = 8538207849522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

2^2066181 is an apocalyptic number.

It is an amenable number.

2066181 is a deficient number, since it is larger than the sum of its proper divisors (998139).

2066181 is a wasteful number, since it uses less digits than its factorization.

2066181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

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

The square root of 2066181 is about 1437.4216500387. The cubic root of 2066181 is about 127.3667658589.

The spelling of 2066181 in words is "two million, sixty-six thousand, one hundred eighty-one".