66117875166 has 96 divisors (see below), whose sum is σ = 164591032320. Its totient is φ = 18790662528.

The previous prime is 66117875113. The next prime is 66117875177. The reversal of 66117875166 is 66157871166.

66117875166 is a `hidden beast` number, since 6 + 6 + 117 + 8 + 7 + 516 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20298610 + ... + 20301866.

It is an arithmetic number, because the mean of its divisors is an integer number (1714489920).

Almost surely, 2^66117875166 is an apocalyptic number.

66117875166 is an abundant number, since it is smaller than the sum of its proper divisors (98473157154).

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

66117875166 is a wasteful number, since it uses less digits than its factorization.

66117875166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078 (or 4075 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 66117875166 in words is "sixty-six billion, one hundred seventeen million, eight hundred seventy-five thousand, one hundred sixty-six".