667615375217217 has 8 divisors (see below), whose sum is σ = 1017318666997696. Its totient is φ = 381494500124112.

The previous prime is 667615375217183. The next prime is 667615375217281. The reversal of 667615375217217 is 712712573516766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667615375217217 - 2¹⁰ = 667615375216193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667615375216217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15895604171818 + ... + 15895604171859.

It is an arithmetic number, because the mean of its divisors is an integer number (127164833374712).

Almost surely, 2^{667615375217217} is an apocalyptic number.

It is an amenable number.

667615375217217 is a deficient number, since it is larger than the sum of its proper divisors (349703291780479).

667615375217217 is a wasteful number, since it uses less digits than its factorization.

667615375217217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31791208343687.

The product of its digits is 155584800, while the sum is 66.

The spelling of 667615375217217 in words is "six hundred sixty-seven trillion, six hundred fifteen billion, three hundred seventy-five million, two hundred seventeen thousand, two hundred seventeen".