2001166 has 16 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 960480.

The previous prime is 2001163. The next prime is 2001179. The reversal of 2001166 is 6611002.

2001166 = T₂₆₈ + T₂₆₉ + ... + T₃₁₄.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5560 + ... + 5908.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^2001166 is an apocalyptic number.

2001166 is a deficient number, since it is larger than the sum of its proper divisors (1123634).

2001166 is a wasteful number, since it uses less digits than its factorization.

2001166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2001166 is about 1414.6257455596. The cubic root of 2001166 is about 126.0165846986.

Adding to 2001166 its reverse (6611002), we get a palindrome (8612168).

The spelling of 2001166 in words is "two million, one thousand, one hundred sixty-six".