2043666 has 12 divisors (see below), whose sum is σ = 4427982. Its totient is φ = 681216.

The previous prime is 2043647. The next prime is 2043673. The reversal of 2043666 is 6663402.

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 164025 = 1371^2 + 405^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56751 + ... + 56786.

2^2043666 is an apocalyptic number.

2043666 is an abundant number, since it is smaller than the sum of its proper divisors (2384316).

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

2043666 is a wasteful number, since it uses less digits than its factorization.

2043666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113545 (or 113542 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 2043666 is about 1429.5684663562. The cubic root of 2043666 is about 126.9024402134.

It can be divided in two parts, 20436 and 66, that added together give a palindrome (20502).

The spelling of 2043666 in words is "two million, forty-three thousand, six hundred sixty-six".