6664823 has 4 divisors (see below), whose sum is σ = 7270728. Its totient is φ = 6058920.

The previous prime is 6664811. The next prime is 6664831. The reversal of 6664823 is 3284666.

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

It is a cyclic number.

It is not a de Polignac number, because 6664823 - 2⁶ = 6664759 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 (6664843) 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, 302936 + ... + 302957.

It is an arithmetic number, because the mean of its divisors is an integer number (1817682).

Almost surely, 2^6664823 is an apocalyptic number.

6664823 is a deficient number, since it is larger than the sum of its proper divisors (605905).

6664823 is a wasteful number, since it uses less digits than its factorization.

6664823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605904.

The product of its digits is 41472, while the sum is 35.

The square root of 6664823 is about 2581.6318482696. The cubic root of 6664823 is about 188.1898546090.

The spelling of 6664823 in words is "six million, six hundred sixty-four thousand, eight hundred twenty-three".