321665116610331 has 48 divisors (see below), whose sum is σ = 512043267511776. Its totient is φ = 193329659271168.

The previous prime is 321665116610317. The next prime is 321665116610333. The reversal of 321665116610331 is 133016611566123.

321665116610331 is a `hidden beast` number, since 3 + 2 + 1 + 66 + 511 + 66 + 10 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 321665116610331 - 2⁶ = 321665116610267 is a prime.

It is a super-2 number, since 2×321665116610331² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321665116610333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64076001 + ... + 68913453.

It is an arithmetic number, because the mean of its divisors is an integer number (10667568073162).

Almost surely, 2^{321665116610331} is an apocalyptic number.

321665116610331 is a deficient number, since it is larger than the sum of its proper divisors (190378150901445).

321665116610331 is a wasteful number, since it uses less digits than its factorization.

321665116610331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850732 (or 4850729 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 321665116610331 in words is "three hundred twenty-one trillion, six hundred sixty-five billion, one hundred sixteen million, six hundred ten thousand, three hundred thirty-one".