66566656600166 has 16 divisors (see below), whose sum is σ = 105110584008000. Its totient is φ = 31529973155688.

The previous prime is 66566656600163. The next prime is 66566656600189. The reversal of 66566656600166 is 66100665666566.

66566656600166 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 2×66566656600166² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566656600163) 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, 43714460 + ... + 45211583.

It is an arithmetic number, because the mean of its divisors is an integer number (6569411500500).

Almost surely, 2^{66566656600166} is an apocalyptic number.

66566656600166 is a deficient number, since it is larger than the sum of its proper divisors (38543927407834).

66566656600166 is a wasteful number, since it uses less digits than its factorization.

66566656600166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88945763.

The product of its (nonzero) digits is 251942400, while the sum is 65.

The spelling of 66566656600166 in words is "sixty-six trillion, five hundred sixty-six billion, six hundred fifty-six million, six hundred thousand, one hundred sixty-six".