321660420608 has 40 divisors (see below), whose sum is σ = 643529137020. Its totient is φ = 160620871680.

The previous prime is 321660420593. The next prime is 321660420623. The reversal of 321660420608 is 806024066123.

It is an interprime number because it is at equal distance from previous prime (321660420593) and next prime (321660420623).

It can be written as a sum of positive squares in 2 ways, for example, as 298150945024 + 23509475584 = 546032^2 + 153328^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14753 + ... + 802208.

Almost surely, 2^321660420608 is an apocalyptic number.

It is an amenable number.

321660420608 is an abundant number, since it is smaller than the sum of its proper divisors (321868716412).

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

321660420608 is an frugal number, since it uses more digits than its factorization.

321660420608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817748 (or 817732 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 321660420608 in words is "three hundred twenty-one billion, six hundred sixty million, four hundred twenty thousand, six hundred eight".