6663445 has 8 divisors (see below), whose sum is σ = 8343936. Its totient is φ = 5098896.

The previous prime is 6663431. The next prime is 6663451. The reversal of 6663445 is 5443666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6663445 - 2⁷ = 6663317 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 6663445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28857 + ... + 29086.

It is an arithmetic number, because the mean of its divisors is an integer number (1042992).

Almost surely, 2^6663445 is an apocalyptic number.

It is an amenable number.

6663445 is a deficient number, since it is larger than the sum of its proper divisors (1680491).

6663445 is a wasteful number, since it uses less digits than its factorization.

6663445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57971.

The product of its digits is 51840, while the sum is 34.

The square root of 6663445 is about 2581.3649490144. The cubic root of 6663445 is about 188.1768838473.

The spelling of 6663445 in words is "six million, six hundred sixty-three thousand, four hundred forty-five".