3440891665 has 4 divisors (see below), whose sum is σ = 4129070004. Its totient is φ = 2752713328.

The previous prime is 3440891603. The next prime is 3440891677. The reversal of 3440891665 is 5661980443.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 527483089 + 2913408576 = 22967^2 + 53976^2 .

It is a cyclic number.

It is not a de Polignac number, because 3440891665 - 2²⁵ = 3407337233 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344089162 + ... + 344089171.

It is an arithmetic number, because the mean of its divisors is an integer number (1032267501).

Almost surely, 2^3440891665 is an apocalyptic number.

It is an amenable number.

3440891665 is a deficient number, since it is larger than the sum of its proper divisors (688178339).

3440891665 is an equidigital number, since it uses as much as digits as its factorization.

3440891665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688178338.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3440891665 is about 58659.1140829795. The cubic root of 3440891665 is about 1509.6988807917.

The spelling of 3440891665 in words is "three billion, four hundred forty million, eight hundred ninety-one thousand, six hundred sixty-five".