6663222 has 20 divisors (see below), whose sum is σ = 14930916. Its totient is φ = 2221020.

The previous prime is 6663203. The next prime is 6663227. The reversal of 6663222 is 2223666.

6663222 = 29² + 30² + ... + 271².

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663227) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20404 + ... + 20727.

Almost surely, 2^6663222 is an apocalyptic number.

6663222 is an abundant number, since it is smaller than the sum of its proper divisors (8267694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663222 is a wasteful number, since it uses less digits than its factorization.

6663222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41145 (or 41136 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 6663222 is about 2581.3217544506. The cubic root of 6663222 is about 188.1747846372.

Adding to 6663222 its reverse (2223666), we get a palindrome (8886888).

The spelling of 6663222 in words is "six million, six hundred sixty-three thousand, two hundred twenty-two".