3665563 has 4 divisors (see below), whose sum is σ = 3998808. Its totient is φ = 3332320.

The previous prime is 3665539. The next prime is 3665573. The reversal of 3665563 is 3655663.

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-3665563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3665573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166606 + ... + 166627.

It is an arithmetic number, because the mean of its divisors is an integer number (999702).

Almost surely, 2^3665563 is an apocalyptic number.

3665563 is a deficient number, since it is larger than the sum of its proper divisors (333245).

3665563 is a wasteful number, since it uses less digits than its factorization.

3665563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333244.

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

The square root of 3665563 is about 1914.5660082640. The cubic root of 3665563 is about 154.1866938028.

It can be divided in two parts, 366 and 5563, that added together give a square (5929 = 77²).

The spelling of 3665563 in words is "three million, six hundred sixty-five thousand, five hundred sixty-three".