6668604 has 36 divisors (see below), whose sum is σ = 17100720. Its totient is φ = 2190720.

The previous prime is 6668603. The next prime is 6668611. The reversal of 6668604 is 4068666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252 + ... + 3860.

It is an arithmetic number, because the mean of its divisors is an integer number (475020).

Almost surely, 2^6668604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6668604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8550360).

6668604 is an abundant number, since it is smaller than the sum of its proper divisors (10432116).

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

6668604 is a wasteful number, since it uses less digits than its factorization.

6668604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690 (or 2685 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 6668604 is about 2582.3640332068. The cubic root of 6668604 is about 188.2254350152.

The spelling of 6668604 in words is "six million, six hundred sixty-eight thousand, six hundred four".