5640663 has 32 divisors (see below), whose sum is σ = 9226240. Its totient is φ = 2993760.

The previous prime is 5640659. The next prime is 5640671. The reversal of 5640663 is 3660465.

It is not a de Polignac number, because 5640663 - 2² = 5640659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5640663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26628 + ... + 26838.

It is an arithmetic number, because the mean of its divisors is an integer number (288320).

Almost surely, 2^5640663 is an apocalyptic number.

5640663 is a deficient number, since it is larger than the sum of its proper divisors (3585577).

5640663 is a wasteful number, since it uses less digits than its factorization.

5640663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 5640663 is about 2375.0079999865. The cubic root of 5640663 is about 178.0095837116.

The spelling of 5640663 in words is "five million, six hundred forty thousand, six hundred sixty-three".