6622209 has 24 divisors (see below), whose sum is σ = 10788960. Its totient is φ = 4011480.

The previous prime is 6622199. The next prime is 6622211. The reversal of 6622209 is 9022266.

It is not a de Polignac number, because 6622209 - 2⁴ = 6622193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6622009) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 2254 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (449540).

Almost surely, 2^6622209 is an apocalyptic number.

It is an amenable number.

6622209 is a deficient number, since it is larger than the sum of its proper divisors (4166751).

6622209 is a wasteful number, since it uses less digits than its factorization.

6622209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6622209 is about 2573.3653063644. The cubic root of 6622209 is about 187.7879096831.

The spelling of 6622209 in words is "six million, six hundred twenty-two thousand, two hundred nine".