66874171086 has 12 divisors (see below), whose sum is σ = 144894037392. Its totient is φ = 22291390356.

The previous prime is 66874171069. The next prime is 66874171099. The reversal of 66874171086 is 68017147866.

66874171086 is a `hidden beast` number, since 66 + 87 + 417 + 10 + 86 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1857615846 + ... + 1857615881.

It is an arithmetic number, because the mean of its divisors is an integer number (12074503116).

Almost surely, 2^66874171086 is an apocalyptic number.

66874171086 is an abundant number, since it is smaller than the sum of its proper divisors (78019866306).

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

66874171086 is a wasteful number, since it uses less digits than its factorization.

66874171086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715231735 (or 3715231732 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 66874171086 in words is "sixty-six billion, eight hundred seventy-four million, one hundred seventy-one thousand, eighty-six".