318213666667 has 4 divisors (see below), whose sum is σ = 342691641040. Its totient is φ = 293735692296.

The previous prime is 318213666619. The next prime is 318213666689. The reversal of 318213666667 is 766666312813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766666312813 = 764563 ⋅1002751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318213666667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318213666697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12238987167 + ... + 12238987192.

It is an arithmetic number, because the mean of its divisors is an integer number (85672910260).

Almost surely, 2^318213666667 is an apocalyptic number.

318213666667 is a deficient number, since it is larger than the sum of its proper divisors (24477974373).

318213666667 is a wasteful number, since it uses less digits than its factorization.

318213666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24477974372.

The product of its digits is 7838208, while the sum is 55.

The spelling of 318213666667 in words is "three hundred eighteen billion, two hundred thirteen million, six hundred sixty-six thousand, six hundred sixty-seven".