6663216 has 60 divisors (see below), whose sum is σ = 20030712. Its totient is φ = 1903104.

The previous prime is 6663203. The next prime is 6663227. The reversal of 6663216 is 6123666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 936 + ... + 3768.

Almost surely, 2^6663216 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 6663216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10015356).

6663216 is an abundant number, since it is smaller than the sum of its proper divisors (13367496).

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

6663216 is a wasteful number, since it uses less digits than its factorization.

6663216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2845 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

The square root of 6663216 is about 2581.3205922551. The cubic root of 6663216 is about 188.1747281555.

The spelling of 6663216 in words is "six million, six hundred sixty-three thousand, two hundred sixteen".