5645663 has 4 divisors (see below), whose sum is σ = 5651520. Its totient is φ = 5639808.

The previous prime is 5645657. The next prime is 5645671. The reversal of 5645663 is 3665465.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5645663 - 2⁸ = 5645407 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 (5645623) 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, 1103 + ... + 3536.

It is an arithmetic number, because the mean of its divisors is an integer number (1412880).

Almost surely, 2^5645663 is an apocalyptic number.

5645663 is a deficient number, since it is larger than the sum of its proper divisors (5857).

5645663 is a wasteful number, since it uses less digits than its factorization.

5645663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856.

The product of its digits is 64800, while the sum is 35.

The square root of 5645663 is about 2376.0603948553. The cubic root of 5645663 is about 178.0621653001.

The spelling of 5645663 in words is "five million, six hundred forty-five thousand, six hundred sixty-three".