664416317402605 has 8 divisors (see below), whose sum is σ = 839262716719200. Its totient is φ = 503557630031376.

The previous prime is 664416317402561. The next prime is 664416317402609. The reversal of 664416317402605 is 506204713614466.

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

It is a cyclic number.

It is not a de Polignac number, because 664416317402605 - 2²⁵ = 664416283848173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664416317402609) 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, 3496927986235 + ... + 3496927986424.

It is an arithmetic number, because the mean of its divisors is an integer number (104907839589900).

Almost surely, 2^{664416317402605} is an apocalyptic number.

It is an amenable number.

664416317402605 is a deficient number, since it is larger than the sum of its proper divisors (174846399316595).

664416317402605 is a wasteful number, since it uses less digits than its factorization.

664416317402605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993855972683.

The product of its (nonzero) digits is 17418240, while the sum is 55.

The spelling of 664416317402605 in words is "six hundred sixty-four trillion, four hundred sixteen billion, three hundred seventeen million, four hundred two thousand, six hundred five".