6665217017 has 8 divisors (see below), whose sum is σ = 6768741216. Its totient is φ = 6561811872.

The previous prime is 6665217011. The next prime is 6665217019. The reversal of 6665217017 is 7107125666.

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 6665217017 - 2¹² = 6665212921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665217011) 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, 86573 + ... + 144309.

It is an arithmetic number, because the mean of its divisors is an integer number (846092652).

Almost surely, 2^6665217017 is an apocalyptic number.

6665217017 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6665217017 is a deficient number, since it is larger than the sum of its proper divisors (103524199).

6665217017 is a wasteful number, since it uses less digits than its factorization.

6665217017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59527.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 6665217017 is about 81640.7803551632. The cubic root of 6665217017 is about 1881.9356306164.

The spelling of 6665217017 in words is "six billion, six hundred sixty-five million, two hundred seventeen thousand, seventeen".