6443660 has 48 divisors (see below), whose sum is σ = 14730240. Its totient is φ = 2358720.

The previous prime is 6443639. The next prime is 6443677. The reversal of 6443660 is 663446.

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, 11507 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (306880).

Almost surely, 2^6443660 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 6443660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7365120).

6443660 is an abundant number, since it is smaller than the sum of its proper divisors (8286580).

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

6443660 is a wasteful number, since it uses less digits than its factorization.

6443660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 6443660 is about 2538.4365266833. The cubic root of 6443660 is about 186.0847881057.

The spelling of 6443660 in words is "six million, four hundred forty-three thousand, six hundred sixty".