3663645 has 8 divisors (see below), whose sum is σ = 5861856. Its totient is φ = 1953936.

The previous prime is 3663617. The next prime is 3663659. The reversal of 3663645 is 5463663.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3663645 - 2⁶ = 3663581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122107 + ... + 122136.

It is an arithmetic number, because the mean of its divisors is an integer number (732732).

Almost surely, 2^3663645 is an apocalyptic number.

It is an amenable number.

3663645 is a deficient number, since it is larger than the sum of its proper divisors (2198211).

3663645 is a wasteful number, since it uses less digits than its factorization.

3663645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244251.

The product of its digits is 38880, while the sum is 33.

The square root of 3663645 is about 1914.0650459167. The cubic root of 3663645 is about 154.1597964636.

The spelling of 3663645 in words is "three million, six hundred sixty-three thousand, six hundred forty-five".