327641665 has 16 divisors (see below), whose sum is σ = 426516048. Its totient is φ = 240178176.

The previous prime is 327641651. The next prime is 327641689. The reversal of 327641665 is 566146723.

It can be written as a sum of positive squares in 8 ways, for example, as 71385601 + 256256064 = 8449^2 + 16008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-327641665 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 9492 + ... + 27301.

It is an arithmetic number, because the mean of its divisors is an integer number (26657253).

Almost surely, 2^327641665 is an apocalyptic number.

It is an amenable number.

327641665 is a deficient number, since it is larger than the sum of its proper divisors (98874383).

327641665 is a wasteful number, since it uses less digits than its factorization.

327641665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36948.

The product of its digits is 181440, while the sum is 40.

The square root of 327641665 is about 18100.8747026214. The cubic root of 327641665 is about 689.3922149135.

The spelling of 327641665 in words is "three hundred twenty-seven million, six hundred forty-one thousand, six hundred sixty-five".