66379971586 has 8 divisors (see below), whose sum is σ = 102781891584. Its totient is φ = 32119341060.

The previous prime is 66379971569. The next prime is 66379971589. The reversal of 66379971586 is 68517997366.

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

It is a super-3 number, since 3×66379971586³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66379971589) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 535322290 + ... + 535322413.

It is an arithmetic number, because the mean of its divisors is an integer number (12847736448).

Almost surely, 2^66379971586 is an apocalyptic number.

66379971586 is a deficient number, since it is larger than the sum of its proper divisors (36401919998).

66379971586 is a wasteful number, since it uses less digits than its factorization.

66379971586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070644736.

The product of its digits is 102876480, while the sum is 67.

The spelling of 66379971586 in words is "sixty-six billion, three hundred seventy-nine million, nine hundred seventy-one thousand, five hundred eighty-six".