2133666 has 24 divisors (see below), whose sum is σ = 4668300. Its totient is φ = 704256.

The previous prime is 2133647. The next prime is 2133673. The reversal of 2133666 is 6663312.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 16641 = 1455^2 + 129^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1510 + ... + 2558.

2^2133666 is an apocalyptic number.

2133666 is an abundant number, since it is smaller than the sum of its proper divisors (2534634).

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

2133666 is a wasteful number, since it uses less digits than its factorization.

2133666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1167 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2133666 is about 1460.7073628896. The cubic root of 2133666 is about 128.7386089775.

Adding to 2133666 its reverse (6663312), we get a palindrome (8796978).

The spelling of 2133666 in words is "two million, one hundred thirty-three thousand, six hundred sixty-six".