6667222789 has 4 divisors (see below), whose sum is σ = 6667645324. Its totient is φ = 6666800256.

The previous prime is 6667222739. The next prime is 6667222801. The reversal of 6667222789 is 9872227666.

6667222789 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1803276225 + 4863946564 = 42465^2 + 69742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6667222789 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 (6667222739) 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, 186642 + ... + 219475.

It is an arithmetic number, because the mean of its divisors is an integer number (1666911331).

Almost surely, 2^6667222789 is an apocalyptic number.

It is an amenable number.

6667222789 is a deficient number, since it is larger than the sum of its proper divisors (422535).

6667222789 is a wasteful number, since it uses less digits than its factorization.

6667222789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422534.

The product of its digits is 6096384, while the sum is 55.

The square root of 6667222789 is about 81653.0635616325. The cubic root of 6667222789 is about 1882.1243894222.

The spelling of 6667222789 in words is "six billion, six hundred sixty-seven million, two hundred twenty-two thousand, seven hundred eighty-nine".