667867581118 has 32 divisors (see below), whose sum is σ = 1080470039040. Its totient is φ = 308578818240.

The previous prime is 667867581113. The next prime is 667867581169. The reversal of 667867581118 is 811185768766.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 667867581118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667867581113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8008705 + ... + 8091667.

It is an arithmetic number, because the mean of its divisors is an integer number (33764688720).

Almost surely, 2^667867581118 is an apocalyptic number.

667867581118 is a deficient number, since it is larger than the sum of its proper divisors (412602457922).

667867581118 is a wasteful number, since it uses less digits than its factorization.

667867581118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88192.

The product of its digits is 27095040, while the sum is 64.

The spelling of 667867581118 in words is "six hundred sixty-seven billion, eight hundred sixty-seven million, five hundred eighty-one thousand, one hundred eighteen".