321056666163 has 12 divisors (see below), whose sum is σ = 464014909488. Its totient is φ = 213914827440.

The previous prime is 321056666129. The next prime is 321056666213. The reversal of 321056666163 is 361666650123.

It is not a de Polignac number, because 321056666163 - 2⁸ = 321056665907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321056666123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10229295 + ... + 10260632.

It is an arithmetic number, because the mean of its divisors is an integer number (38667909124).

Almost surely, 2^321056666163 is an apocalyptic number.

321056666163 is a deficient number, since it is larger than the sum of its proper divisors (142958243325).

321056666163 is a wasteful number, since it uses less digits than its factorization.

321056666163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20491674 (or 20491671 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 321056666163 in words is "three hundred twenty-one billion, fifty-six million, six hundred sixty-six thousand, one hundred sixty-three".