667338817 has 8 divisors (see below), whose sum is σ = 670095360. Its totient is φ = 664588320.

The previous prime is 667338811. The next prime is 667338823. The reversal of 667338817 is 718833766.

It is an interprime number because it is at equal distance from previous prime (667338811) and next prime (667338823).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667338817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667338811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504517 + ... + 505837.

It is an arithmetic number, because the mean of its divisors is an integer number (83761920).

Almost surely, 2^667338817 is an apocalyptic number.

It is an amenable number.

667338817 is a deficient number, since it is larger than the sum of its proper divisors (2756543).

667338817 is a wasteful number, since it uses less digits than its factorization.

667338817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its digits is 1016064, while the sum is 49.

The square root of 667338817 is about 25832.9018308048. The cubic root of 667338817 is about 873.8739548239.

The spelling of 667338817 in words is "six hundred sixty-seven million, three hundred thirty-eight thousand, eight hundred seventeen".