1222345666779 has 8 divisors (see below), whose sum is σ = 1700654840832. Its totient is φ = 779466801960.

The previous prime is 1222345666753. The next prime is 1222345666813. The reversal of 1222345666779 is 9776665432221.

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

It is not a de Polignac number, because 1222345666779 - 2⁵ = 1222345666747 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222345666739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8857577227 + ... + 8857577364.

It is an arithmetic number, because the mean of its divisors is an integer number (212581855104).

Almost surely, 2^{1222345666779} is an apocalyptic number.

1222345666779 is a deficient number, since it is larger than the sum of its proper divisors (478309174053).

1222345666779 is a wasteful number, since it uses less digits than its factorization.

1222345666779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17715154617.

The product of its digits is 45722880, while the sum is 60.

The spelling of 1222345666779 in words is "one trillion, two hundred twenty-two billion, three hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".