66117716116 has 24 divisors (see below), whose sum is σ = 116820305280. Its totient is φ = 32740939392.

The previous prime is 66117716111. The next prime is 66117716117. The reversal of 66117716116 is 61161771166.

It is a super-2 number, since 2×66117716116² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66117716111) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 534805 + ... + 646723.

It is an arithmetic number, because the mean of its divisors is an integer number (4867512720).

Almost surely, 2^66117716116 is an apocalyptic number.

It is an amenable number.

66117716116 is a deficient number, since it is larger than the sum of its proper divisors (50702589164).

66117716116 is a wasteful number, since it uses less digits than its factorization.

66117716116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113343 (or 113341 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The spelling of 66117716116 in words is "sixty-six billion, one hundred seventeen million, seven hundred sixteen thousand, one hundred sixteen".