2663654565 has 64 divisors (see below), whose sum is σ = 5123543040. Its totient is φ = 1164360960.

The previous prime is 2663654561. The next prime is 2663654659. The reversal of 2663654565 is 5654563662.

It is not a de Polignac number, because 2663654565 - 2² = 2663654561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663654561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77796 + ... + 106674.

It is an arithmetic number, because the mean of its divisors is an integer number (80055360).

Almost surely, 2^2663654565 is an apocalyptic number.

It is an amenable number.

2663654565 is a deficient number, since it is larger than the sum of its proper divisors (2459888475).

2663654565 is a wasteful number, since it uses less digits than its factorization.

2663654565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28954.

The product of its digits is 3888000, while the sum is 48.

The square root of 2663654565 is about 51610.6051601800. The cubic root of 2663654565 is about 1386.2002333310.

The spelling of 2663654565 in words is "two billion, six hundred sixty-three million, six hundred fifty-four thousand, five hundred sixty-five".