6626 has 4 divisors (see below), whose sum is σ = 9942.
Its totient is φ = 3312.
The previous prime is 6619. The next prime is 6637. The reversal of 6626 is 6266.
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., 4225 + 2401 = 65^2 + 49^2
It is a junction number, because it is equal to n+sod(n) for n = 6598 and 6607.
It is an unprimeable number.
6626 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1655 + ... + 1658.
26626 is an apocalyptic number.
6626 is a deficient number, since it is larger than the sum of its proper divisors (3316).
6626 is a wasteful number, since it uses less digits than its factorization.
6626 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3315.
The product of its digits is 432, while the sum is 20.
The square root of 6626 is about 81.4002456999.
The cubic root of 6626 is about 18.7823737011.
The spelling of 6626 in words is "six thousand, six hundred twenty-six".