3666943 has 16 divisors (see below), whose sum is σ = 4480000. Its totient is φ = 2931552.

The previous prime is 3666919. The next prime is 3666947. The reversal of 3666943 is 3496663.

It is a cyclic number.

It is not a de Polignac number, because 3666943 - 2¹³ = 3658751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10333 + ... + 10681.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

Almost surely, 2^3666943 is an apocalyptic number.

3666943 is a deficient number, since it is larger than the sum of its proper divisors (813057).

3666943 is a wasteful number, since it uses less digits than its factorization.

3666943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its digits is 69984, while the sum is 37.

The square root of 3666943 is about 1914.9263693417. The cubic root of 3666943 is about 154.2060406208.

The spelling of 3666943 in words is "three million, six hundred sixty-six thousand, nine hundred forty-three".