1665032665 has 8 divisors (see below), whose sum is σ = 2006765640. Its totient is φ = 1326208512.

The previous prime is 1665032659. The next prime is 1665032701. The reversal of 1665032665 is 5662305661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 734843664 + 930189001 = 27108^2 + 30499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1665032665 - 2¹¹ = 1665030617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725944 + ... + 728233.

It is an arithmetic number, because the mean of its divisors is an integer number (250845705).

Almost surely, 2^1665032665 is an apocalyptic number.

It is an amenable number.

1665032665 is a deficient number, since it is larger than the sum of its proper divisors (341732975).

1665032665 is a wasteful number, since it uses less digits than its factorization.

1665032665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454411.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 1665032665 is about 40804.8117873370. The cubic root of 1665032665 is about 1185.2435101649.

The spelling of 1665032665 in words is "one billion, six hundred sixty-five million, thirty-two thousand, six hundred sixty-five".