260221066634565 has 24 divisors (see below), whose sum is σ = 451050368130648. Its totient is φ = 138784409088000.

The previous prime is 260221066634549. The next prime is 260221066634629. The reversal of 260221066634565 is 565436660122062.

It can be written as a sum of positive squares in 4 ways, for example, as 25680387326724 + 234540679307841 = 5067582^2 + 15314721^2 .

It is not a de Polignac number, because 260221066634565 - 2⁴ = 260221066634549 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43399717 + ... + 49030373.

It is an arithmetic number, because the mean of its divisors is an integer number (18793765338777).

Almost surely, 2^{260221066634565} is an apocalyptic number.

It is an amenable number.

260221066634565 is a deficient number, since it is larger than the sum of its proper divisors (190829301496083).

260221066634565 is a wasteful number, since it uses less digits than its factorization.

260221066634565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657669 (or 6657666 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 54.

The spelling of 260221066634565 in words is "two hundred sixty trillion, two hundred twenty-one billion, sixty-six million, six hundred thirty-four thousand, five hundred sixty-five".