3646663 has 8 divisors (see below), whose sum is σ = 3865680. Its totient is φ = 3433920.

The previous prime is 3646661. The next prime is 3646681. The reversal of 3646663 is 3666463.

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

It is a cyclic number.

It is not a de Polignac number, because 3646663 - 2¹ = 3646661 is a prime.

It is a Duffinian number.

3646663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 2722.

It is an arithmetic number, because the mean of its divisors is an integer number (483210).

Almost surely, 2^3646663 is an apocalyptic number.

3646663 is a deficient number, since it is larger than the sum of its proper divisors (219017).

3646663 is a wasteful number, since it uses less digits than its factorization.

3646663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137.

The product of its digits is 46656, while the sum is 34.

The square root of 3646663 is about 1909.6237849378. The cubic root of 3646663 is about 153.9212364983.

The spelling of 3646663 in words is "three million, six hundred forty-six thousand, six hundred sixty-three".