6663606 has 32 divisors (see below), whose sum is σ = 14065920. Its totient is φ = 2100384.

The previous prime is 6663599. The next prime is 6663611. The reversal of 6663606 is 6063666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14821 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (439560).

Almost surely, 2^6663606 is an apocalyptic number.

6663606 is an abundant number, since it is smaller than the sum of its proper divisors (7402314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663606 is a wasteful number, since it uses less digits than its factorization.

6663606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 6663606 is about 2581.3961338779. The cubic root of 6663606 is about 188.1783993914.

The spelling of 6663606 in words is "six million, six hundred sixty-three thousand, six hundred six".