10661561061013 has 8 divisors (see below), whose sum is σ = 10771938817920. Its totient is φ = 10551192789120.

The previous prime is 10661561061007. The next prime is 10661561061037. The reversal of 10661561061013 is 31016016516601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10661561061013 - 2⁵ = 10661561060981 is a prime.

It is a super-2 number, since 2×10661561061013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661561064013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100333 + ... + 4618786.

It is an arithmetic number, because the mean of its divisors is an integer number (1346492352240).

Almost surely, 2^{10661561061013} is an apocalyptic number.

It is an amenable number.

10661561061013 is a deficient number, since it is larger than the sum of its proper divisors (110377756907).

10661561061013 is an equidigital number, since it uses as much as digits as its factorization.

10661561061013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742507.

The product of its (nonzero) digits is 19440, while the sum is 37.

Adding to 10661561061013 its reverse (31016016516601), we get a palindrome (41677577577614).

The spelling of 10661561061013 in words is "ten trillion, six hundred sixty-one billion, five hundred sixty-one million, sixty-one thousand, thirteen".