6666673217 has 8 divisors (see below), whose sum is σ = 6809851776. Its totient is φ = 6523550352.

The previous prime is 6666673213. The next prime is 6666673219. The reversal of 6666673217 is 7123766666.

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 6666673217 - 2² = 6666673213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666673213) 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, 305918 + ... + 326984.

It is an arithmetic number, because the mean of its divisors is an integer number (851231472).

Almost surely, 2^6666673217 is an apocalyptic number.

It is an amenable number.

6666673217 is a deficient number, since it is larger than the sum of its proper divisors (143178559).

6666673217 is a wasteful number, since it uses less digits than its factorization.

6666673217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27847.

The product of its digits is 2286144, while the sum is 50.

The square root of 6666673217 is about 81649.6982051985. The cubic root of 6666673217 is about 1882.0726741718.

The spelling of 6666673217 in words is "six billion, six hundred sixty-six million, six hundred seventy-three thousand, two hundred seventeen".