66717181136 has 20 divisors (see below), whose sum is σ = 132270691872. Its totient is φ = 32582809056.

The previous prime is 66717181121. The next prime is 66717181151. The reversal of 66717181136 is 63118171766.

It is an interprime number because it is at equal distance from previous prime (66717181121) and next prime (66717181151).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 48485636 + ... + 48487011.

Almost surely, 2^66717181136 is an apocalyptic number.

It is an amenable number.

66717181136 is a deficient number, since it is larger than the sum of its proper divisors (65553510736).

66717181136 is a wasteful number, since it uses less digits than its factorization.

66717181136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96972698 (or 96972692 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The spelling of 66717181136 in words is "sixty-six billion, seven hundred seventeen million, one hundred eighty-one thousand, one hundred thirty-six".