166606066611 has 6 divisors (see below), whose sum is σ = 240653207340. Its totient is φ = 111070711068.

The previous prime is 166606066589. The next prime is 166606066643. The reversal of 166606066611 is 116660606661.

It is not a de Polignac number, because 166606066611 - 2¹³ = 166606058419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166606066651) 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 5 ways as a sum of consecutive naturals, for example, 9255892581 + ... + 9255892598.

It is an arithmetic number, because the mean of its divisors is an integer number (40108867890).

Almost surely, 2^166606066611 is an apocalyptic number.

166606066611 is a deficient number, since it is larger than the sum of its proper divisors (74047140729).

166606066611 is a wasteful number, since it uses less digits than its factorization.

166606066611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18511785185 (or 18511785182 counting only the distinct ones).

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

The spelling of 166606066611 in words is "one hundred sixty-six billion, six hundred six million, sixty-six thousand, six hundred eleven".