8061759665 has 4 divisors (see below), whose sum is σ = 9674111604. Its totient is φ = 6449407728.

The previous prime is 8061759631. The next prime is 8061759683. The reversal of 8061759665 is 5669571608.

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 3491864464 + 4569895201 = 59092^2 + 67601^2 .

It is a cyclic number.

It is not a de Polignac number, because 8061759665 - 2²⁰ = 8060711089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806175962 + ... + 806175971.

It is an arithmetic number, because the mean of its divisors is an integer number (2418527901).

Almost surely, 2^8061759665 is an apocalyptic number.

It is an amenable number.

8061759665 is a deficient number, since it is larger than the sum of its proper divisors (1612351939).

8061759665 is a wasteful number, since it uses less digits than its factorization.

8061759665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612351938.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The square root of 8061759665 is about 89787.3023595207. The cubic root of 8061759665 is about 2005.1334513156.

The spelling of 8061759665 in words is "eight billion, sixty-one million, seven hundred fifty-nine thousand, six hundred sixty-five".