667267218906 has 16 divisors (see below), whose sum is σ = 1334631022848. Its totient is φ = 222406308800.

The previous prime is 667267218901. The next prime is 667267218911. The reversal of 667267218906 is 609812762766.

It is an interprime number because it is at equal distance from previous prime (667267218901) and next prime (667267218911).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667267218906.

It is not an unprimeable number, because it can be changed into a prime (667267218901) 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, 3934410 + ... + 4100501.

It is an arithmetic number, because the mean of its divisors is an integer number (83414438928).

Almost surely, 2^667267218906 is an apocalyptic number.

667267218906 is an abundant number, since it is smaller than the sum of its proper divisors (667363803942).

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

667267218906 is a wasteful number, since it uses less digits than its factorization.

667267218906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8048757.

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 667267218906 in words is "six hundred sixty-seven billion, two hundred sixty-seven million, two hundred eighteen thousand, nine hundred six".