5664665 has 4 divisors (see below), whose sum is σ = 6797604. Its totient is φ = 4531728.

The previous prime is 5664653. The next prime is 5664671.

5664665 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 633616 + 5031049 = 796^2 + 2243^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664665 - 2¹⁴ = 5648281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566462 + ... + 566471.

It is an arithmetic number, because the mean of its divisors is an integer number (1699401).

Almost surely, 2^5664665 is an apocalyptic number.

It is an amenable number.

5664665 is a deficient number, since it is larger than the sum of its proper divisors (1132939).

5664665 is a wasteful number, since it uses less digits than its factorization.

5664665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132938.

The product of its digits is 129600, while the sum is 38.

The square root of 5664665 is about 2380.0556716178. The cubic root of 5664665 is about 178.2617136542.

The spelling of 5664665 in words is "five million, six hundred sixty-four thousand, six hundred sixty-five".