66117716120 has 32 divisors (see below), whose sum is σ = 149535681120. Its totient is φ = 26310051840.

The previous prime is 66117716117. The next prime is 66117716131. The reversal of 66117716120 is 2161771166.

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 7 ways as a sum of consecutive naturals, for example, 4274516 + ... + 4289955.

It is an arithmetic number, because the mean of its divisors is an integer number (4672990035).

Almost surely, 2^66117716120 is an apocalyptic number.

It is an amenable number.

66117716120 is an abundant number, since it is smaller than the sum of its proper divisors (83417965000).

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

66117716120 is a wasteful number, since it uses less digits than its factorization.

66117716120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564675 (or 8564671 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 66117716120 in words is "sixty-six billion, one hundred seventeen million, seven hundred sixteen thousand, one hundred twenty".