5666543 has 4 divisors (see below), whose sum is σ = 5671848. Its totient is φ = 5661240.

The previous prime is 5666539. The next prime is 5666561. The reversal of 5666543 is 3456665.

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: 3456665 = 5 ⋅691333.

It is a cyclic number.

It is not a de Polignac number, because 5666543 - 2² = 5666539 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 (5666443) 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, 428 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (1417962).

Almost surely, 2^5666543 is an apocalyptic number.

5666543 is a deficient number, since it is larger than the sum of its proper divisors (5305).

5666543 is a wasteful number, since it uses less digits than its factorization.

5666543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304.

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

The square root of 5666543 is about 2380.4501675103. The cubic root of 5666543 is about 178.2814111126.

The spelling of 5666543 in words is "five million, six hundred sixty-six thousand, five hundred forty-three".