6644222 has 16 divisors (see below), whose sum is σ = 10776192. Its totient is φ = 3054240.

The previous prime is 6644191. The next prime is 6644227. The reversal of 6644222 is 2224466.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6644191 and 6644200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10643 + ... + 11249.

It is an arithmetic number, because the mean of its divisors is an integer number (673512).

Almost surely, 2^6644222 is an apocalyptic number.

6644222 is a deficient number, since it is larger than the sum of its proper divisors (4131970).

6644222 is a wasteful number, since it uses less digits than its factorization.

6644222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043.

The product of its digits is 4608, while the sum is 26.

The square root of 6644222 is about 2577.6388420413. The cubic root of 6644222 is about 187.9957559024.

Adding to 6644222 its reverse (2224466), we get a palindrome (8868688).

The spelling of 6644222 in words is "six million, six hundred forty-four thousand, two hundred twenty-two".