66717644012297 has 16 divisors (see below), whose sum is σ = 70829745701760. Its totient is φ = 62626534242048.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012297 is 79221044671766.

It is not a de Polignac number, because 66717644012297 - 2¹⁰ = 66717644011273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66717644012207) 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, 11383979 + ... + 16218207.

It is an arithmetic number, because the mean of its divisors is an integer number (4426859106360).

Almost surely, 2^{66717644012297} is an apocalyptic number.

It is an amenable number.

66717644012297 is a deficient number, since it is larger than the sum of its proper divisors (4112101689463).

66717644012297 is a wasteful number, since it uses less digits than its factorization.

66717644012297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836400.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 66717644012297 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, two hundred ninety-seven".