66110660660061 has 12 divisors (see below), whose sum is σ = 95623453703388. Its totient is φ = 44013645837504.

The previous prime is 66110660660003. The next prime is 66110660660111. The reversal of 66110660660061 is 16006606601166.

66110660660061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 46540707305625 + 19569953354436 = 6822075^2 + 4423794^2 .

It is not a de Polignac number, because 66110660660061 - 2¹³ = 66110660651869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66110660659989 and 66110660660016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66110660661061) 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 11 ways as a sum of consecutive naturals, for example, 5010654360 + ... + 5010667553.

It is an arithmetic number, because the mean of its divisors is an integer number (7968621141949).

Almost surely, 2^{66110660660061} is an apocalyptic number.

It is an amenable number.

66110660660061 is a deficient number, since it is larger than the sum of its proper divisors (29512793043327).

66110660660061 is a wasteful number, since it uses less digits than its factorization.

66110660660061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021322652 (or 10021322649 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 66110660660061 in words is "sixty-six trillion, one hundred ten billion, six hundred sixty million, six hundred sixty thousand, sixty-one".