6628 has 6 divisors (see below), whose sum is σ = 11606. Its totient is φ = 3312.

The previous prime is 6619. The next prime is 6637. The reversal of 6628 is 8266.

It is an interprime number because it is at equal distance from previous prime (6619) and next prime (6637).

It can be written as a sum of positive squares in only one way, i.e., 5184 + 1444 = 72^2 + 38^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6599 and 6608.

It is an unprimeable number.

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, 825 + ... + 832.

It is an amenable number.

6628 is a deficient number, since it is larger than the sum of its proper divisors (4978).

6628 is a wasteful number, since it uses less digits than its factorization.

6628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661 (or 1659 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 6628 is about 81.4125297482. The cubic root of 6628 is about 18.7842632759.

The spelling of 6628 in words is "six thousand, six hundred twenty-eight".