66766109184 has 60 divisors (see below), whose sum is σ = 192691525026. Its totient is φ = 22255368192.

The previous prime is 66766109161. The next prime is 66766109209. The reversal of 66766109184 is 48190166766.

It is a happy number.

66766109184 is a `hidden beast` number, since 6 + 6 + 7 + 6 + 610 + 9 + 18 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40739385600 + 26026723584 = 201840^2 + 161328^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66766109184.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7239979 + ... + 7249194.

Almost surely, 2^66766109184 is an apocalyptic number.

66766109184 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66766109184 is an abundant number, since it is smaller than the sum of its proper divisors (125925415842).

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

66766109184 is a wasteful number, since it uses less digits than its factorization.

66766109184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14489197 (or 14489178 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 66766109184 in words is "sixty-six billion, seven hundred sixty-six million, one hundred nine thousand, one hundred eighty-four".