3565663 has 4 divisors (see below), whose sum is σ = 3574368. Its totient is φ = 3556960.

The previous prime is 3565619. The next prime is 3565669. The reversal of 3565663 is 3665653.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3565663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3565669) 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 3 ways as a sum of consecutive naturals, for example, 3706 + ... + 4567.

It is an arithmetic number, because the mean of its divisors is an integer number (893592).

Almost surely, 2^3565663 is an apocalyptic number.

3565663 is a deficient number, since it is larger than the sum of its proper divisors (8705).

3565663 is an equidigital number, since it uses as much as digits as its factorization.

3565663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8704.

The product of its digits is 48600, while the sum is 34.

The square root of 3565663 is about 1888.2963220851. The cubic root of 3565663 is about 152.7730555406.

The spelling of 3565663 in words is "three million, five hundred sixty-five thousand, six hundred sixty-three".