1666244 has 12 divisors (see below), whose sum is σ = 2978304. Its totient is φ = 815304.

The previous prime is 1666237. The next prime is 1666261. The reversal of 1666244 is 4426661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (248192).

2^1666244 is an apocalyptic number.

It is an amenable number.

1666244 is a deficient number, since it is larger than the sum of its proper divisors (1312060).

1666244 is a wasteful number, since it uses less digits than its factorization.

1666244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8914 (or 8912 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 1666244 is about 1290.8307402599. The cubic root of 1666244 is about 118.5530867674.

The spelling of 1666244 in words is "one million, six hundred sixty-six thousand, two hundred forty-four".