665163224636 has 24 divisors (see below), whose sum is σ = 1232932382640. Its totient is φ = 312910291712.

The previous prime is 665163224597. The next prime is 665163224639. The reversal of 665163224636 is 636422361566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665163224639) 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, 1483490 + ... + 1879113.

It is an arithmetic number, because the mean of its divisors is an integer number (51372182610).

Almost surely, 2^665163224636 is an apocalyptic number.

It is an amenable number.

665163224636 is a deficient number, since it is larger than the sum of its proper divisors (567769158004).

665163224636 is a wasteful number, since it uses less digits than its factorization.

665163224636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365533 (or 3365531 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 50.

The spelling of 665163224636 in words is "six hundred sixty-five billion, one hundred sixty-three million, two hundred twenty-four thousand, six hundred thirty-six".