66155056505660 has 24 divisors (see below), whose sum is σ = 139157547933600. Its totient is φ = 26417845598144.

The previous prime is 66155056505467. The next prime is 66155056505663. The reversal of 66155056505660 is 6650565055166.

66155056505660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66155056505660² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66155056505596 and 66155056505605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155056505663) 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, 2761050479 + ... + 2761074438.

It is an arithmetic number, because the mean of its divisors is an integer number (5798231163900).

Almost surely, 2^{66155056505660} is an apocalyptic number.

It is an amenable number.

66155056505660 is an abundant number, since it is smaller than the sum of its proper divisors (73002491427940).

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

66155056505660 is a wasteful number, since it uses less digits than its factorization.

66155056505660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522125525 (or 5522125523 counting only the distinct ones).

The product of its (nonzero) digits is 24300000, while the sum is 56.

The spelling of 66155056505660 in words is "sixty-six trillion, one hundred fifty-five billion, fifty-six million, five hundred five thousand, six hundred sixty".