6722 has 4 divisors (see below), whose sum is σ = 10086. Its totient is φ = 3360.

The previous prime is 6719. The next prime is 6733. The reversal of 6722 is 2276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5041 + 1681 = 71^2 + 41^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6722.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1679 + ... + 1682.

2⁶⁷²² is an apocalyptic number.

6722 is a deficient number, since it is larger than the sum of its proper divisors (3364).

6722 is a wasteful number, since it uses less digits than its factorization.

6722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363.

The product of its digits is 168, while the sum is 17.

The square root of 6722 is about 81.9878039711. The cubic root of 6722 is about 18.8726478364.

Adding to 6722 its reverse (2276), we get a palindrome (8998).

The spelling of 6722 in words is "six thousand, seven hundred twenty-two".