6617172017 has 2 divisors, whose sum is σ = 6617172018. Its totient is φ = 6617172016.

The previous prime is 6617172011. The next prime is 6617172043. The reversal of 6617172017 is 7102717166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4411085056 + 2206086961 = 66416^2 + 46969^2 .

It is a cyclic number.

It is not a de Polignac number, because 6617172017 - 2²⁶ = 6550063153 is a prime.

It is not a weakly prime, because it can be changed into another prime (6617172011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308586008 + 3308586009.

It is an arithmetic number, because the mean of its divisors is an integer number (3308586009).

Almost surely, 2^6617172017 is an apocalyptic number.

It is an amenable number.

6617172017 is a deficient number, since it is larger than the sum of its proper divisors (1).

6617172017 is an equidigital number, since it uses as much as digits as its factorization.

6617172017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 6617172017 is about 81346.0018501217. The cubic root of 6617172017 is about 1877.4028587515.

The spelling of 6617172017 in words is "six billion, six hundred seventeen million, one hundred seventy-two thousand, seventeen".