667984318 has 16 divisors (see below), whose sum is σ = 1037610000. Its totient is φ = 322138432.

The previous prime is 667984307. The next prime is 667984319. The reversal of 667984318 is 813489766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667984319) 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, 55353 + ... + 66331.

It is an arithmetic number, because the mean of its divisors is an integer number (64850625).

Almost surely, 2^667984318 is an apocalyptic number.

667984318 is a deficient number, since it is larger than the sum of its proper divisors (369625682).

667984318 is a wasteful number, since it uses less digits than its factorization.

667984318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12059.

The product of its digits is 1741824, while the sum is 52.

The square root of 667984318 is about 25845.3925874613. The cubic root of 667984318 is about 874.1556232055.

The spelling of 667984318 in words is "six hundred sixty-seven million, nine hundred eighty-four thousand, three hundred eighteen".