665168074856 has 16 divisors (see below), whose sum is σ = 1249793884800. Its totient is φ = 331889705584.

The previous prime is 665168074849. The next prime is 665168074877. The reversal of 665168074856 is 658470861566.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86787410 + ... + 86795073.

It is an arithmetic number, because the mean of its divisors is an integer number (78112117800).

Almost surely, 2^665168074856 is an apocalyptic number.

It is an amenable number.

665168074856 is a deficient number, since it is larger than the sum of its proper divisors (584625809944).

665168074856 is a wasteful number, since it uses less digits than its factorization.

665168074856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173582968 (or 173582964 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 665168074856 in words is "six hundred sixty-five billion, one hundred sixty-eight million, seventy-four thousand, eight hundred fifty-six".