667688534216 has 32 divisors (see below), whose sum is σ = 1391494982400. Its totient is φ = 297768469440.

The previous prime is 667688534209. The next prime is 667688534243. The reversal of 667688534216 is 612435886766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71574296 + ... + 71583623.

It is an arithmetic number, because the mean of its divisors is an integer number (43484218200).

Almost surely, 2^667688534216 is an apocalyptic number.

It is an amenable number.

667688534216 is an abundant number, since it is smaller than the sum of its proper divisors (723806448184).

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

667688534216 is a wasteful number, since it uses less digits than its factorization.

667688534216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143157989 (or 143157985 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 62.

The spelling of 667688534216 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, five hundred thirty-four thousand, two hundred sixteen".