6697216 has 18 divisors (see below), whose sum is σ = 13368782. Its totient is φ = 3348480.

The previous prime is 6697213. The next prime is 6697219. The reversal of 6697216 is 6127966.

It is an interprime number because it is at equal distance from previous prime (6697213) and next prime (6697219).

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 1679616 = 2240^2 + 1296^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (6697213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825 + ... + 13336.

Almost surely, 2^6697216 is an apocalyptic number.

It is an amenable number.

6697216 is a deficient number, since it is larger than the sum of its proper divisors (6671566).

6697216 is an equidigital number, since it uses as much as digits as its factorization.

6697216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26177 (or 26163 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 6697216 is about 2587.8979887159. The cubic root of 6697216 is about 188.4942480075.

The spelling of 6697216 in words is "six million, six hundred ninety-seven thousand, two hundred sixteen".