667471371868 has 24 divisors (see below), whose sum is σ = 1362186476000. Its totient is φ = 286059158784.

The previous prime is 667471371863. The next prime is 667471371877. The reversal of 667471371868 is 868173174766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667471371863) 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, 243246213 + ... + 243248956.

Almost surely, 2^667471371868 is an apocalyptic number.

It is an amenable number.

667471371868 is an abundant number, since it is smaller than the sum of its proper divisors (694715104132).

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

667471371868 is a wasteful number, since it uses less digits than its factorization.

667471371868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486495194 (or 486495178 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 64.

The spelling of 667471371868 in words is "six hundred sixty-seven billion, four hundred seventy-one million, three hundred seventy-one thousand, eight hundred sixty-eight".