22002178666789 has 2 divisors, whose sum is σ = 22002178666790. Its totient is φ = 22002178666788.

The previous prime is 22002178666717. The next prime is 22002178666807. The reversal of 22002178666789 is 98766687120022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18335164313764 + 3667014353025 = 4281958^2 + 1914945^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002178666789 - 2⁷ = 22002178666661 is a prime.

It is a super-4 number, since 4×22002178666789⁴ (a number of 54 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22002178666789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002178666189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001089333394 + 11001089333395.

It is an arithmetic number, because the mean of its divisors is an integer number (11001089333395).

Almost surely, 2^{22002178666789} is an apocalyptic number.

It is an amenable number.

22002178666789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002178666789 is an equidigital number, since it uses as much as digits as its factorization.

22002178666789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 22002178666789 in words is "twenty-two trillion, two billion, one hundred seventy-eight million, six hundred sixty-six thousand, seven hundred eighty-nine".