6636416 has 32 divisors (see below), whose sum is σ = 13351800. Its totient is φ = 3285504.

The previous prime is 6636359. The next prime is 6636433. The reversal of 6636416 is 6146366.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17606 + ... + 17978.

Almost surely, 2^6636416 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 6636416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6675900).

6636416 is an abundant number, since it is smaller than the sum of its proper divisors (6715384).

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

6636416 is a wasteful number, since it uses less digits than its factorization.

6636416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 514 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 6636416 is about 2576.1242206074. The cubic root of 6636416 is about 187.9221044428.

The spelling of 6636416 in words is "six million, six hundred thirty-six thousand, four hundred sixteen".