5641663 has 4 divisors (see below), whose sum is σ = 5647528. Its totient is φ = 5635800.

The previous prime is 5641661. The next prime is 5641679. The reversal of 5641663 is 3661465.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3661465 = 5 ⋅732293.

It is a cyclic number.

It is not a de Polignac number, because 5641663 - 2¹ = 5641661 is a prime.

It is a super-2 number, since 2×5641663² = 63656722811138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641661) 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, 1113 + ... + 3538.

It is an arithmetic number, because the mean of its divisors is an integer number (1411882).

Almost surely, 2^5641663 is an apocalyptic number.

5641663 is a deficient number, since it is larger than the sum of its proper divisors (5865).

5641663 is a wasteful number, since it uses less digits than its factorization.

5641663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864.

The product of its digits is 12960, while the sum is 31.

The square root of 5641663 is about 2375.2185162633. The cubic root of 5641663 is about 178.0201025144.

The spelling of 5641663 in words is "five million, six hundred forty-one thousand, six hundred sixty-three".