6667216 has 20 divisors (see below), whose sum is σ = 13364100. Its totient is φ = 3218432.

The previous prime is 6667207. The next prime is 6667223. The reversal of 6667216 is 6127666.

It can be written as a sum of positive squares in 2 ways, for example, as 3763600 + 2903616 = 1940^2 + 1704^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6721 + ... + 7648.

It is an arithmetic number, because the mean of its divisors is an integer number (668205).

Almost surely, 2^6667216 is an apocalyptic number.

It is an amenable number.

6667216 is an abundant number, since it is smaller than the sum of its proper divisors (6696884).

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

6667216 is a wasteful number, since it uses less digits than its factorization.

6667216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14406 (or 14400 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 6667216 is about 2582.0952732229. The cubic root of 6667216 is about 188.2123750588.

The spelling of 6667216 in words is "six million, six hundred sixty-seven thousand, two hundred sixteen".