66571166061 has 16 divisors (see below), whose sum is σ = 100484781120. Its totient is φ = 43543403280.

The previous prime is 66571166059. The next prime is 66571166069. The reversal of 66571166061 is 16066117566.

66571166061 is a `hidden beast` number, since 6 + 6 + 571 + 16 + 6 + 0 + 61 = 666.

It is not a de Polignac number, because 66571166061 - 2¹ = 66571166059 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66571165998 and 66571166016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66571166069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23258935 + ... + 23261796.

It is an arithmetic number, because the mean of its divisors is an integer number (6280298820).

Almost surely, 2^66571166061 is an apocalyptic number.

It is an amenable number.

66571166061 is a deficient number, since it is larger than the sum of its proper divisors (33913615059).

66571166061 is a wasteful number, since it uses less digits than its factorization.

66571166061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46520793 (or 46520787 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 66571166061 in words is "sixty-six billion, five hundred seventy-one million, one hundred sixty-six thousand, sixty-one".