11122345666778 has 8 divisors (see below), whose sum is σ = 16686661013460. Its totient is φ = 5560125328960.

The previous prime is 11122345666777. The next prime is 11122345666801. The reversal of 11122345666778 is 87766654322111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7953849546049 + 3168496120729 = 2820257^2 + 1780027^2 .

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 (11122345666771) 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, 523738943 + ... + 523760178.

Almost surely, 2^{11122345666778} is an apocalyptic number.

11122345666778 is a deficient number, since it is larger than the sum of its proper divisors (5564315346682).

11122345666778 is a wasteful number, since it uses less digits than its factorization.

11122345666778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047504432.

The product of its digits is 20321280, while the sum is 59.

Adding to 11122345666778 its reverse (87766654322111), we get a palindrome (98888999988889).

The spelling of 11122345666778 in words is "eleven trillion, one hundred twenty-two billion, three hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-eight".