3666944 has 22 divisors (see below), whose sum is σ = 7332354. Its totient is φ = 1832960.

The previous prime is 3666919. The next prime is 3666947. The reversal of 3666944 is 4496663.

It is a happy number.

3666944 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in only one way, i.e., 3564544 + 102400 = 1888^2 + 320^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3666898 and 3666907.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 767 + ... + 2814.

Almost surely, 2^3666944 is an apocalyptic number.

It is an amenable number.

3666944 is a deficient number, since it is larger than the sum of its proper divisors (3665410).

3666944 is an equidigital number, since it uses as much as digits as its factorization.

3666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601 (or 3583 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 3666944 is about 1914.9266304483. The cubic root of 3666944 is about 154.2060546385.

The spelling of 3666944 in words is "three million, six hundred sixty-six thousand, nine hundred forty-four".