222724022618665 has 4 divisors (see below), whose sum is σ = 267268827142404. Its totient is φ = 178179218094928.

The previous prime is 222724022618609. The next prime is 222724022618683. The reversal of 222724022618665 is 566816220427222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112381540232256 + 110342482386409 = 10601016^2 + 10504403^2 .

It is a cyclic number.

It is not a de Polignac number, because 222724022618665 - 2¹¹ = 222724022616617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22272402261862 + ... + 22272402261871.

It is an arithmetic number, because the mean of its divisors is an integer number (66817206785601).

Almost surely, 2^{222724022618665} is an apocalyptic number.

It is an amenable number.

222724022618665 is a deficient number, since it is larger than the sum of its proper divisors (44544804523739).

222724022618665 is an equidigital number, since it uses as much as digits as its factorization.

222724022618665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44544804523738.

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 222724022618665 in words is "two hundred twenty-two trillion, seven hundred twenty-four billion, twenty-two million, six hundred eighteen thousand, six hundred sixty-five".