6765443222221 has 4 divisors (see below), whose sum is σ = 6771142838592. Its totient is φ = 6759743605852.

The previous prime is 6765443222147. The next prime is 6765443222243. The reversal of 6765443222221 is 1222223445676.

It is a happy number.

6765443222221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6765443222221 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 (6765443222261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2849806405 + ... + 2849808778.

It is an arithmetic number, because the mean of its divisors is an integer number (1692785709648).

Almost surely, 2^{6765443222221} is an apocalyptic number.

It is an amenable number.

6765443222221 is a deficient number, since it is larger than the sum of its proper divisors (5699616371).

6765443222221 is a wasteful number, since it uses less digits than its factorization.

6765443222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699616370.

The product of its digits is 1935360, while the sum is 46.

Adding to 6765443222221 its reverse (1222223445676), we get a palindrome (7987666667897).

The spelling of 6765443222221 in words is "six trillion, seven hundred sixty-five billion, four hundred forty-three million, two hundred twenty-two thousand, two hundred twenty-one".