1001110660565 has 4 divisors (see below), whose sum is σ = 1201332792684. Its totient is φ = 800888528448.

The previous prime is 1001110660549. The next prime is 1001110660607. The reversal of 1001110660565 is 5650660111001.

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 219921605764 + 781189054801 = 468958^2 + 883849^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001110660565 - 2⁴ = 1001110660549 is a prime.

It is a super-2 number, since 2×1001110660565² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 100111066052 + ... + 100111066061.

It is an arithmetic number, because the mean of its divisors is an integer number (300333198171).

Almost surely, 2^{1001110660565} is an apocalyptic number.

It is an amenable number.

1001110660565 is a deficient number, since it is larger than the sum of its proper divisors (200222132119).

1001110660565 is an equidigital number, since it uses as much as digits as its factorization.

1001110660565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200222132118.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 1001110660565 its reverse (5650660111001), we get a palindrome (6651770771566).

The spelling of 1001110660565 in words is "one trillion, one billion, one hundred ten million, six hundred sixty thousand, five hundred sixty-five".