66086013185 has 8 divisors (see below), whose sum is σ = 80120775336. Its totient is φ = 52323770880.

The previous prime is 66086013167. The next prime is 66086013193. The reversal of 66086013185 is 58131068066.

It is a Cunningham number, because it is equal to 257072²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 23791211536 + 42294801649 = 154244^2 + 205657^2 .

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

It is not a de Polignac number, because 66086013185 - 2¹⁸ = 66085751041 is a prime.

It is a super-2 number, since 2×66086013185² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68129426 + ... + 68130395.

It is an arithmetic number, because the mean of its divisors is an integer number (10015096917).

Almost surely, 2^66086013185 is an apocalyptic number.

It is an amenable number.

66086013185 is a deficient number, since it is larger than the sum of its proper divisors (14034762151).

66086013185 is a wasteful number, since it uses less digits than its factorization.

66086013185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136259923.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 66086013185 in words is "sixty-six billion, eighty-six million, thirteen thousand, one hundred eighty-five".