11223278666669 has 2 divisors, whose sum is σ = 11223278666670. Its totient is φ = 11223278666668.

The previous prime is 11223278666647. The next prime is 11223278666689. The reversal of 11223278666669 is 96666687232211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8645728691044 + 2577549975625 = 2940362^2 + 1605475^2 .

It is an emirp because it is prime and its reverse (96666687232211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11223278666669 - 2²⁴ = 11223261889453 is a prime.

It is a super-2 number, since 2×11223278666669² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11223278666689) 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 as a sum of consecutive naturals, namely, 5611639333334 + 5611639333335.

It is an arithmetic number, because the mean of its divisors is an integer number (5611639333335).

Almost surely, 2^{11223278666669} is an apocalyptic number.

It is an amenable number.

11223278666669 is a deficient number, since it is larger than the sum of its proper divisors (1).

11223278666669 is an equidigital number, since it uses as much as digits as its factorization.

11223278666669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 65.

The spelling of 11223278666669 in words is "eleven trillion, two hundred twenty-three billion, two hundred seventy-eight million, six hundred sixty-six thousand, six hundred sixty-nine".