667438375616 has 28 divisors (see below), whose sum is σ = 1329161400600. Its totient is φ = 332531566080.

The previous prime is 667438375609. The next prime is 667438375729. The reversal of 667438375616 is 616573834766.

It is an unprimeable number.

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, 18538466 + ... + 18574433.

Almost surely, 2^667438375616 is an apocalyptic number.

It is an amenable number.

667438375616 is a deficient number, since it is larger than the sum of its proper divisors (661723024984).

667438375616 is a wasteful number, since it uses less digits than its factorization.

667438375616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37113192 (or 37113182 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 62.

The spelling of 667438375616 in words is "six hundred sixty-seven billion, four hundred thirty-eight million, three hundred seventy-five thousand, six hundred sixteen".