3821666 has 16 divisors (see below), whose sum is σ = 5896800. Its totient is φ = 1856928.

The previous prime is 3821647. The next prime is 3821669. The reversal of 3821666 is 6661283.

It is not an unprimeable number, because it can be changed into a prime (3821669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16286 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 2^3821666 is an apocalyptic number.

3821666 is a deficient number, since it is larger than the sum of its proper divisors (2075134).

3821666 is a wasteful number, since it uses less digits than its factorization.

3821666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its digits is 10368, while the sum is 32.

The square root of 3821666 is about 1954.9081819871. The cubic root of 3821666 is about 156.3450885738.

It can be divided in two parts, 382 and 1666, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 3821666 in words is "three million, eight hundred twenty-one thousand, six hundred sixty-six".