66716068168 has 64 divisors (see below), whose sum is σ = 132772608000. Its totient is φ = 31363455552.

The previous prime is 66716068147. The next prime is 66716068187. The reversal of 66716068168 is 86186061766.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3289563 + ... + 3309781.

It is an arithmetic number, because the mean of its divisors is an integer number (2074572000).

Almost surely, 2^66716068168 is an apocalyptic number.

It is an amenable number.

66716068168 is a deficient number, since it is larger than the sum of its proper divisors (66056539832).

66716068168 is a wasteful number, since it uses less digits than its factorization.

66716068168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20554 (or 20550 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 66716068168 in words is "sixty-six billion, seven hundred sixteen million, sixty-eight thousand, one hundred sixty-eight".