6657216 has 28 divisors (see below), whose sum is σ = 17614392. Its totient is φ = 2219008.

The previous prime is 6657193. The next prime is 6657223. The reversal of 6657216 is 6127566.

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, 17145 + ... + 17528.

Almost surely, 2^6657216 is an apocalyptic number.

It is an amenable number.

6657216 is an abundant number, since it is smaller than the sum of its proper divisors (10957176).

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

6657216 is a wasteful number, since it uses less digits than its factorization.

6657216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34688 (or 34678 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 6657216 is about 2580.1581346886. The cubic root of 6657216 is about 188.1182295404.

The spelling of 6657216 in words is "six million, six hundred fifty-seven thousand, two hundred sixteen".