6644850 has 48 divisors (see below), whose sum is σ = 17022720. Its totient is φ = 1713600.

The previous prime is 6644843. The next prime is 6644863. The reversal of 6644850 is 584466.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3936 + ... + 5364.

It is an arithmetic number, because the mean of its divisors is an integer number (354640).

Almost surely, 2^6644850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6644850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8511360).

6644850 is an abundant number, since it is smaller than the sum of its proper divisors (10377870).

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

6644850 is a wasteful number, since it uses less digits than its factorization.

6644850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6644850 is about 2577.7606560734. The cubic root of 6644850 is about 188.0016787235.

The spelling of 6644850 in words is "six million, six hundred forty-four thousand, eight hundred fifty".