13125075661 has 16 divisors (see below), whose sum is σ = 13570799616. Its totient is φ = 12687083136.

The previous prime is 13125075599. The next prime is 13125075679. The reversal of 13125075661 is 16657052131.

It is a cyclic number.

It is not a de Polignac number, because 13125075661 - 2¹¹ = 13125073613 is a prime.

It is a super-2 number, since 2×13125075661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13125075661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13125075361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6123556 + ... + 6125698.

It is an arithmetic number, because the mean of its divisors is an integer number (848174976).

Almost surely, 2^13125075661 is an apocalyptic number.

It is an amenable number.

13125075661 is a deficient number, since it is larger than the sum of its proper divisors (445723955).

13125075661 is a wasteful number, since it uses less digits than its factorization.

13125075661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 13125075661 in words is "thirteen billion, one hundred twenty-five million, seventy-five thousand, six hundred sixty-one".