66507056712017 has 16 divisors (see below), whose sum is σ = 68900572032000. Its totient is φ = 64120227562944.

The previous prime is 66507056712011. The next prime is 66507056712023. The reversal of 66507056712017 is 71021765070566.

It is an interprime number because it is at equal distance from previous prime (66507056712011) and next prime (66507056712023).

It is a cyclic number.

It is not a de Polignac number, because 66507056712017 - 2²⁴ = 66507039934801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66507056712017.

It is not an unprimeable number, because it can be changed into a prime (66507056712011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554244008 + ... + 554363990.

It is an arithmetic number, because the mean of its divisors is an integer number (4306285752000).

Almost surely, 2^{66507056712017} is an apocalyptic number.

It is an amenable number.

66507056712017 is a deficient number, since it is larger than the sum of its proper divisors (2393515319983).

66507056712017 is a wasteful number, since it uses less digits than its factorization.

66507056712017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147680.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 66507056712017 in words is "sixty-six trillion, five hundred seven billion, fifty-six million, seven hundred twelve thousand, seventeen".