2221266668865 has 32 divisors (see below), whose sum is σ = 3574306759680. Its totient is φ = 1177933396224.

The previous prime is 2221266668827. The next prime is 2221266668867. The reversal of 2221266668865 is 5688666621222.

It is not a de Polignac number, because 2221266668865 - 2¹⁴ = 2221266652481 is a prime.

It is a super-2 number, since 2×2221266668865² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221266668799 and 2221266668808.

It is not an unprimeable number, because it can be changed into a prime (2221266668867) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1432207 + ... + 2548283.

It is an arithmetic number, because the mean of its divisors is an integer number (111697086240).

Almost surely, 2^{2221266668865} is an apocalyptic number.

It is an amenable number.

2221266668865 is a deficient number, since it is larger than the sum of its proper divisors (1353040090815).

2221266668865 is a wasteful number, since it uses less digits than its factorization.

2221266668865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116841.

The product of its digits is 39813120, while the sum is 60.

The spelling of 2221266668865 in words is "two trillion, two hundred twenty-one billion, two hundred sixty-six million, six hundred sixty-eight thousand, eight hundred sixty-five".