1665883089 has 24 divisors (see below), whose sum is σ = 2592768360. Its totient is φ = 1024607232.

The previous prime is 1665883069. The next prime is 1665883103. The reversal of 1665883089 is 9803885661.

It can be written as a sum of positive squares in 4 ways, for example, as 754326225 + 911556864 = 27465^2 + 30192^2 .

It is not a de Polignac number, because 1665883089 - 2⁸ = 1665882833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665883019) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 368527 + ... + 373019.

It is an arithmetic number, because the mean of its divisors is an integer number (108032015).

Almost surely, 2^1665883089 is an apocalyptic number.

It is an amenable number.

1665883089 is a deficient number, since it is larger than the sum of its proper divisors (926885271).

1665883089 is a wasteful number, since it uses less digits than its factorization.

1665883089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7681 (or 7678 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 1665883089 is about 40815.2310908563. The cubic root of 1665883089 is about 1185.4452655599.

The spelling of 1665883089 in words is "one billion, six hundred sixty-five million, eight hundred eighty-three thousand, eighty-nine".