6664367 has 4 divisors (see below), whose sum is σ = 6688200. Its totient is φ = 6640536.

The previous prime is 6664351. The next prime is 6664381. The reversal of 6664367 is 7634666.

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 6664367 - 2⁴ = 6664351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6664367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11492 + ... + 12057.

It is an arithmetic number, because the mean of its divisors is an integer number (1672050).

Almost surely, 2^6664367 is an apocalyptic number.

6664367 is a deficient number, since it is larger than the sum of its proper divisors (23833).

6664367 is a wasteful number, since it uses less digits than its factorization.

6664367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23832.

The product of its digits is 108864, while the sum is 38.

The square root of 6664367 is about 2581.5435305259. The cubic root of 6664367 is about 188.1855625955.

Subtracting 6664367 from its reverse (7634666), we obtain a cube (970299 = 99³).

The spelling of 6664367 in words is "six million, six hundred sixty-four thousand, three hundred sixty-seven".