22478864665 has 8 divisors (see below), whose sum is σ = 27059733000. Its totient is φ = 17926361472.

The previous prime is 22478864659. The next prime is 22478864693. The reversal of 22478864665 is 56646887422.

It can be written as a sum of positive squares in 4 ways, for example, as 42719296 + 22436145369 = 6536^2 + 149787^2 .

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 22478864665 - 2⁵ = 22478864633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7089540 + ... + 7092709.

It is an arithmetic number, because the mean of its divisors is an integer number (3382466625).

Almost surely, 2^22478864665 is an apocalyptic number.

It is an amenable number.

22478864665 is a deficient number, since it is larger than the sum of its proper divisors (4580868335).

22478864665 is a wasteful number, since it uses less digits than its factorization.

22478864665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182571.

The product of its digits is 30965760, while the sum is 58.

The spelling of 22478864665 in words is "twenty-two billion, four hundred seventy-eight million, eight hundred sixty-four thousand, six hundred sixty-five".