265676342665 has 4 divisors (see below), whose sum is σ = 318811611204. Its totient is φ = 212541074128.

The previous prime is 265676342639. The next prime is 265676342683. The reversal of 265676342665 is 566243676562.

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 61953201216 + 203723141449 = 248904^2 + 451357^2 .

It is a cyclic number.

It is not a de Polignac number, because 265676342665 - 2¹¹ = 265676340617 is a prime.

It is a Duffinian 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, 26567634262 + ... + 26567634271.

It is an arithmetic number, because the mean of its divisors is an integer number (79702902801).

Almost surely, 2^265676342665 is an apocalyptic number.

It is an amenable number.

265676342665 is a deficient number, since it is larger than the sum of its proper divisors (53135268539).

265676342665 is an equidigital number, since it uses as much as digits as its factorization.

265676342665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53135268538.

The product of its digits is 65318400, while the sum is 58.

The spelling of 265676342665 in words is "two hundred sixty-five billion, six hundred seventy-six million, three hundred forty-two thousand, six hundred sixty-five".