61661100160060 has 12 divisors (see below), whose sum is σ = 129488310336168. Its totient is φ = 24664440064016.

The previous prime is 61661100159979. The next prime is 61661100160061. The reversal of 61661100160060 is 6006100116616.

61661100160060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61661100159998 and 61661100160025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61661100160061) 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 3 ways as a sum of consecutive naturals, for example, 1541527503982 + ... + 1541527504021.

It is an arithmetic number, because the mean of its divisors is an integer number (10790692528014).

Almost surely, 2^{61661100160060} is an apocalyptic number.

It is an amenable number.

61661100160060 is an abundant number, since it is smaller than the sum of its proper divisors (67827210176108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61661100160060 is a wasteful number, since it uses less digits than its factorization.

61661100160060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083055008012 (or 3083055008010 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

Adding to 61661100160060 its reverse (6006100116616), we get a palindrome (67667200276676).

The spelling of 61661100160060 in words is "sixty-one trillion, six hundred sixty-one billion, one hundred million, one hundred sixty thousand, sixty".