6664668 has 24 divisors (see below), whose sum is σ = 16369920. Its totient is φ = 2104560.

The previous prime is 6664667. The next prime is 6664711. The reversal of 6664668 is 8664666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664661) 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 7 ways as a sum of consecutive naturals, for example, 14388 + ... + 14843.

It is an arithmetic number, because the mean of its divisors is an integer number (682080).

Almost surely, 2^6664668 is an apocalyptic number.

It is an amenable number.

6664668 is an abundant number, since it is smaller than the sum of its proper divisors (9705252).

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

6664668 is a wasteful number, since it uses less digits than its factorization.

6664668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29257 (or 29255 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 6664668 is about 2581.6018283229. The cubic root of 6664668 is about 188.1883957229.

The spelling of 6664668 in words is "six million, six hundred sixty-four thousand, six hundred sixty-eight".