65366722665 has 12 divisors (see below), whose sum is σ = 113302319364. Its totient is φ = 34862252064.

The previous prime is 65366722649. The next prime is 65366722699. The reversal of 65366722665 is 56622766356.

It can be written as a sum of positive squares in 2 ways, for example, as 43953961104 + 21412761561 = 209652^2 + 146331^2 .

It is not a de Polignac number, because 65366722665 - 2⁴ = 65366722649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 726296874 + ... + 726296963.

It is an arithmetic number, because the mean of its divisors is an integer number (9441859947).

Almost surely, 2^65366722665 is an apocalyptic number.

It is an amenable number.

65366722665 is a deficient number, since it is larger than the sum of its proper divisors (47935596699).

65366722665 is a wasteful number, since it uses less digits than its factorization.

65366722665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452593848 (or 1452593845 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 54.

The spelling of 65366722665 in words is "sixty-five billion, three hundred sixty-six million, seven hundred twenty-two thousand, six hundred sixty-five".