9936666140525 has 6 divisors (see below), whose sum is σ = 12321466014282. Its totient is φ = 7949332912400.

The previous prime is 9936666140491. The next prime is 9936666140593. The reversal of 9936666140525 is 5250416666399.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1367358374281 + 8569307766244 = 1169341^2 + 2927338^2 .

It is not a de Polignac number, because 9936666140525 - 2²⁰ = 9936665091949 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 198733322786 + ... + 198733322835.

It is an arithmetic number, because the mean of its divisors is an integer number (2053577669047).

Almost surely, 2^{9936666140525} is an apocalyptic number.

It is an amenable number.

9936666140525 is a deficient number, since it is larger than the sum of its proper divisors (2384799873757).

9936666140525 is a wasteful number, since it uses less digits than its factorization.

9936666140525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397466645631 (or 397466645626 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 62.

The spelling of 9936666140525 in words is "nine trillion, nine hundred thirty-six billion, six hundred sixty-six million, one hundred forty thousand, five hundred twenty-five".