222366651561 has 6 divisors (see below), whose sum is σ = 321196274490. Its totient is φ = 148244434368.

The previous prime is 222366651553. The next prime is 222366651587. The reversal of 222366651561 is 165156663222.

222366651561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 187493330025 + 34873321536 = 433005^2 + 186744^2 .

It is not a de Polignac number, because 222366651561 - 2³ = 222366651553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222366651541) 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 5 ways as a sum of consecutive naturals, for example, 12353702856 + ... + 12353702873.

It is an arithmetic number, because the mean of its divisors is an integer number (53532712415).

Almost surely, 2^222366651561 is an apocalyptic number.

It is an amenable number.

222366651561 is a deficient number, since it is larger than the sum of its proper divisors (98829622929).

222366651561 is a wasteful number, since it uses less digits than its factorization.

222366651561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24707405735 (or 24707405732 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 222366651561 in words is "two hundred twenty-two billion, three hundred sixty-six million, six hundred fifty-one thousand, five hundred sixty-one".