6643336 has 32 divisors (see below), whose sum is σ = 14394240. Its totient is φ = 2815488.

The previous prime is 6643333. The next prime is 6643337. The reversal of 6643336 is 6333466.

It is a junction number, because it is equal to n+sod(n) for n = 6643298 and 6643307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643333) 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, 4821 + ... + 6043.

It is an arithmetic number, because the mean of its divisors is an integer number (449820).

Almost surely, 2^6643336 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 6643336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7197120).

6643336 is an abundant number, since it is smaller than the sum of its proper divisors (7750904).

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

6643336 is a wasteful number, since it uses less digits than its factorization.

6643336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1329 counting only the distinct ones).

The product of its digits is 23328, while the sum is 31.

The square root of 6643336 is about 2577.4669736002. The cubic root of 6643336 is about 187.9873991856.

The spelling of 6643336 in words is "six million, six hundred forty-three thousand, three hundred thirty-six".