6666673218 has 8 divisors (see below), whose sum is σ = 13333346448. Its totient is φ = 2222224404.

The previous prime is 6666673213. The next prime is 6666673219. The reversal of 6666673218 is 8123766666.

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

6666673218 is an admirable number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 555556096 + ... + 555556107.

It is an arithmetic number, because the mean of its divisors is an integer number (1666668306).

Almost surely, 2^6666673218 is an apocalyptic number.

6666673218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666673218 is a wasteful number, since it uses less digits than its factorization.

6666673218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111112208.

The product of its digits is 2612736, while the sum is 51.

The square root of 6666673218 is about 81649.6982113223. The cubic root of 6666673218 is about 1882.0726742659.

The spelling of 6666673218 in words is "six billion, six hundred sixty-six million, six hundred seventy-three thousand, two hundred eighteen".