66168124871 has 8 divisors (see below), whose sum is σ = 68312544384. Its totient is φ = 64024328160.

The previous prime is 66168124831. The next prime is 66168124873. The reversal of 66168124871 is 17842186166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66168124871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66168124873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65225 + ... + 369581.

It is an arithmetic number, because the mean of its divisors is an integer number (8539068048).

Almost surely, 2^66168124871 is an apocalyptic number.

66168124871 is a deficient number, since it is larger than the sum of its proper divisors (2144419513).

66168124871 is a wasteful number, since it uses less digits than its factorization.

66168124871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311401.

The product of its digits is 774144, while the sum is 50.

The spelling of 66168124871 in words is "sixty-six billion, one hundred sixty-eight million, one hundred twenty-four thousand, eight hundred seventy-one".