22055440100665 has 4 divisors (see below), whose sum is σ = 26466528120804. Its totient is φ = 17644352080528.

The previous prime is 22055440100653. The next prime is 22055440100689. The reversal of 22055440100665 is 56600104455022.

It is a happy number.

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 15030671517481 + 7024768583184 = 3876941^2 + 2650428^2 .

It is a cyclic number.

It is not a de Polignac number, because 22055440100665 - 2²⁵ = 22055406546233 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205544010062 + ... + 2205544010071.

It is an arithmetic number, because the mean of its divisors is an integer number (6616632030201).

Almost surely, 2^{22055440100665} is an apocalyptic number.

It is an amenable number.

22055440100665 is a deficient number, since it is larger than the sum of its proper divisors (4411088020139).

22055440100665 is an equidigital number, since it uses as much as digits as its factorization.

22055440100665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411088020138.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 22055440100665 its reverse (56600104455022), we get a palindrome (78655544555687).

The spelling of 22055440100665 in words is "twenty-two trillion, fifty-five billion, four hundred forty million, one hundred thousand, six hundred sixty-five".