216672717 has 24 divisors (see below), whose sum is σ = 301658656. Its totient is φ = 138325824.

The previous prime is 216672697. The next prime is 216672749. The reversal of 216672717 is 717276612.

It is not a de Polignac number, because 216672717 - 2⁸ = 216672461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216672017) 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, 395838 + ... + 396384.

Almost surely, 2^216672717 is an apocalyptic number.

It is an amenable number.

216672717 is a deficient number, since it is larger than the sum of its proper divisors (84985939).

216672717 is a wasteful number, since it uses less digits than its factorization.

216672717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 736 counting only the distinct ones).

The product of its digits is 49392, while the sum is 39.

The square root of 216672717 is about 14719.8069620495. The cubic root of 216672717 is about 600.6222405825.

The spelling of 216672717 in words is "two hundred sixteen million, six hundred seventy-two thousand, seven hundred seventeen".