5664551 has 4 divisors (see below), whose sum is σ = 5670000. Its totient is φ = 5659104.

The previous prime is 5664523. The next prime is 5664563. The reversal of 5664551 is 1554665.

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 a de Polignac number, because none of the positive numbers 2^k-5664551 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 (5664511) 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, 626 + ... + 3423.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^5664551 is an apocalyptic number.

5664551 is a deficient number, since it is larger than the sum of its proper divisors (5449).

5664551 is a wasteful number, since it uses less digits than its factorization.

5664551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448.

The product of its digits is 18000, while the sum is 32.

The square root of 5664551 is about 2380.0317224777. The cubic root of 5664551 is about 178.2605178217.

The spelling of 5664551 in words is "five million, six hundred sixty-four thousand, five hundred fifty-one".