66217710513068 has 12 divisors (see below), whose sum is σ = 115881320229360. Its totient is φ = 33108761876112.

The previous prime is 66217710513029. The next prime is 66217710513083. The reversal of 66217710513068 is 86031501771266.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21737288 + ... + 24595631.

It is an arithmetic number, because the mean of its divisors is an integer number (9656776685780).

Almost surely, 2^{66217710513068} is an apocalyptic number.

It is an amenable number.

66217710513068 is a deficient number, since it is larger than the sum of its proper divisors (49663609716292).

66217710513068 is a wasteful number, since it uses less digits than its factorization.

66217710513068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46690216 (or 46690214 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 66217710513068 in words is "sixty-six trillion, two hundred seventeen billion, seven hundred ten million, five hundred thirteen thousand, sixty-eight".