22665546640565 has 8 divisors (see below), whose sum is σ = 28798576908120. Its totient is φ = 17065823352832.

The previous prime is 22665546640523. The next prime is 22665546640567. The reversal of 22665546640565 is 56504664556622.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 526573727716 + 22138972912849 = 725654^2 + 4705207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22665546640565 - 2²⁴ = 22665529863349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22665546640498 and 22665546640507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22665546640567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133326744860 + ... + 133326745029.

It is an arithmetic number, because the mean of its divisors is an integer number (3599822113515).

Almost surely, 2^{22665546640565} is an apocalyptic number.

It is an amenable number.

22665546640565 is a deficient number, since it is larger than the sum of its proper divisors (6133030267555).

22665546640565 is a wasteful number, since it uses less digits than its factorization.

22665546640565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266653489911.

The product of its (nonzero) digits is 311040000, while the sum is 62.

The spelling of 22665546640565 in words is "twenty-two trillion, six hundred sixty-five billion, five hundred forty-six million, six hundred forty thousand, five hundred sixty-five".