3665624 has 16 divisors (see below), whose sum is σ = 7020000. Its totient is φ = 1793632.

The previous prime is 3665609. The next prime is 3665633. The reversal of 3665624 is 4265663.

It is a d-powerful number, because it can be written as 3² + 6 + 6² + 5⁹ + 6⁸ + 2¹⁵ + 4³ .

It is a congruent number.

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, 4499 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (438750).

Almost surely, 2^3665624 is an apocalyptic number.

It is an amenable number.

3665624 is a deficient number, since it is larger than the sum of its proper divisors (3354376).

3665624 is a wasteful number, since it uses less digits than its factorization.

3665624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9802 (or 9798 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 3665624 is about 1914.5819387010. The cubic root of 3665624 is about 154.1875490908.

The spelling of 3665624 in words is "three million, six hundred sixty-five thousand, six hundred twenty-four".