6720216 has 16 divisors (see below), whose sum is σ = 16800600. Its totient is φ = 2240064.

The previous prime is 6720191. The next prime is 6720227. The reversal of 6720216 is 6120276.

It is a happy number.

It is a super-2 number, since 2×6720216² = 90322606173312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 280009 = 6720216 / (6 + 7 + 2 + 0 + 2 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139981 + ... + 140028.

Almost surely, 2^6720216 is an apocalyptic number.

It is an amenable number.

6720216 is an abundant number, since it is smaller than the sum of its proper divisors (10080384).

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

6720216 is a wasteful number, since it uses less digits than its factorization.

6720216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280018 (or 280014 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 6720216 is about 2592.3379409329. The cubic root of 6720216 is about 188.7097810598.

The spelling of 6720216 in words is "six million, seven hundred twenty thousand, two hundred sixteen".