6602221 has 4 divisors (see below), whose sum is σ = 6664032. Its totient is φ = 6540412.

The previous prime is 6602209. The next prime is 6602237. The reversal of 6602221 is 1222066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1222066 = 2 ⋅611033.

It is a cyclic number.

It is not a de Polignac number, because 6602221 - 2⁷ = 6602093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6602201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30745 + ... + 30958.

It is an arithmetic number, because the mean of its divisors is an integer number (1666008).

Almost surely, 2^6602221 is an apocalyptic number.

It is an amenable number.

6602221 is a deficient number, since it is larger than the sum of its proper divisors (61811).

6602221 is a wasteful number, since it uses less digits than its factorization.

6602221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61810.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 6602221 is about 2569.4787409122. The cubic root of 6602221 is about 187.5987840948.

Adding to 6602221 its reverse (1222066), we get a palindrome (7824287).

The spelling of 6602221 in words is "six million, six hundred two thousand, two hundred twenty-one".