6646222 has 16 divisors (see below), whose sum is σ = 10921392. Its totient is φ = 3008320.

The previous prime is 6646217. The next prime is 6646231. The reversal of 6646222 is 2226466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6498 + ... + 7450.

It is an arithmetic number, because the mean of its divisors is an integer number (682587).

Almost surely, 2^6646222 is an apocalyptic number.

6646222 is a deficient number, since it is larger than the sum of its proper divisors (4275170).

6646222 is a wasteful number, since it uses less digits than its factorization.

6646222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 6912, while the sum is 28.

The square root of 6646222 is about 2578.0267647951. The cubic root of 6646222 is about 188.0146170919.

It can be divided in two parts, 664 and 6222, that added together give a palindrome (6886).

The spelling of 6646222 in words is "six million, six hundred forty-six thousand, two hundred twenty-two".