22332166561 has 4 divisors (see below), whose sum is σ = 23102241300. Its totient is φ = 21562091824.

The previous prime is 22332166517. The next prime is 22332166579. The reversal of 22332166561 is 16566123322.

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 14703017536 + 7629149025 = 121256^2 + 87345^2 .

It is a cyclic number.

It is not a de Polignac number, because 22332166561 - 2¹³ = 22332158369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22332166561.

It is not an unprimeable number, because it can be changed into a prime (22332166061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385037326 + ... + 385037383.

It is an arithmetic number, because the mean of its divisors is an integer number (5775560325).

Almost surely, 2^22332166561 is an apocalyptic number.

It is an amenable number.

22332166561 is a deficient number, since it is larger than the sum of its proper divisors (770074739).

22332166561 is an equidigital number, since it uses as much as digits as its factorization.

22332166561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770074738.

The product of its digits is 77760, while the sum is 37.

Adding to 22332166561 its reverse (16566123322), we get a palindrome (38898289883).

The spelling of 22332166561 in words is "twenty-two billion, three hundred thirty-two million, one hundred sixty-six thousand, five hundred sixty-one".