327957321666 has 128 divisors (see below), whose sum is σ = 725498484480. Its totient is φ = 98220874752.

The previous prime is 327957321647. The next prime is 327957321667. The reversal of 327957321666 is 666123759723.

It is not an unprimeable number, because it can be changed into a prime (327957321667) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161633940 + ... + 161635968.

It is an arithmetic number, because the mean of its divisors is an integer number (5667956910).

Almost surely, 2^327957321666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 327957321666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362749242240).

327957321666 is an abundant number, since it is smaller than the sum of its proper divisors (397541162814).

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

327957321666 is a wasteful number, since it uses less digits than its factorization.

327957321666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its digits is 17146080, while the sum is 57.

The spelling of 327957321666 in words is "three hundred twenty-seven billion, nine hundred fifty-seven million, three hundred twenty-one thousand, six hundred sixty-six".