66468671217 has 24 divisors (see below), whose sum is σ = 104030070144. Its totient is φ = 40652842464.

The previous prime is 66468671197. The next prime is 66468671219. The reversal of 66468671217 is 71217686466.

It is not a de Polignac number, because 66468671217 - 2¹⁰ = 66468670193 is a prime.

It is a super-2 number, since 2×66468671217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66468671219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1723593 + ... + 1761734.

It is an arithmetic number, because the mean of its divisors is an integer number (4334586256).

Almost surely, 2^66468671217 is an apocalyptic number.

It is an amenable number.

66468671217 is a deficient number, since it is larger than the sum of its proper divisors (37561398927).

66468671217 is a wasteful number, since it uses less digits than its factorization.

66468671217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485509 (or 3485506 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 66468671217 in words is "sixty-six billion, four hundred sixty-eight million, six hundred seventy-one thousand, two hundred seventeen".