6664856 has 32 divisors (see below), whose sum is σ = 13899600. Its totient is φ = 2970240.

The previous prime is 6664843. The next prime is 6664859. The reversal of 6664856 is 6584666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664859) 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 7 ways as a sum of consecutive naturals, for example, 3950 + ... + 5378.

Almost surely, 2^6664856 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 6664856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6949800).

6664856 is an abundant number, since it is smaller than the sum of its proper divisors (7234744).

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

6664856 is a wasteful number, since it uses less digits than its factorization.

6664856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1495 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 6664856 is about 2581.6382395680. The cubic root of 6664856 is about 188.1901652077.

The spelling of 6664856 in words is "six million, six hundred sixty-four thousand, eight hundred fifty-six".