1222345666 has 8 divisors (see below), whose sum is σ = 1841525820. Its totient is φ = 608503728.

The previous prime is 1222345661. The next prime is 1222345681. The reversal of 1222345666 is 6665432221.

It can be written as a sum of positive squares in 2 ways, for example, as 1199583225 + 22762441 = 34635^2 + 4771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222345661) 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, 1333981 + ... + 1334896.

Almost surely, 2^1222345666 is an apocalyptic number.

1222345666 is a deficient number, since it is larger than the sum of its proper divisors (619180154).

1222345666 is a wasteful number, since it uses less digits than its factorization.

1222345666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669108.

The product of its digits is 103680, while the sum is 37.

The square root of 1222345666 is about 34962.0603797888. The cubic root of 1222345666 is about 1069.2141042555.

Adding to 1222345666 its reverse (6665432221), we get a palindrome (7887777887).

The spelling of 1222345666 in words is "one billion, two hundred twenty-two million, three hundred forty-five thousand, six hundred sixty-six".