442616665 has 4 divisors (see below), whose sum is σ = 531140004. Its totient is φ = 354093328.

The previous prime is 442616659. The next prime is 442616683. The reversal of 442616665 is 566616244.

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 347300496 + 95316169 = 18636^2 + 9763^2 .

It is a cyclic number.

It is not a de Polignac number, because 442616665 - 2²³ = 434228057 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44261662 + ... + 44261671.

It is an arithmetic number, because the mean of its divisors is an integer number (132785001).

Almost surely, 2^442616665 is an apocalyptic number.

It is an amenable number.

442616665 is a deficient number, since it is larger than the sum of its proper divisors (88523339).

442616665 is an equidigital number, since it uses as much as digits as its factorization.

442616665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88523338.

The product of its digits is 207360, while the sum is 40.

The square root of 442616665 is about 21038.4568112778. The cubic root of 442616665 is about 762.0952484138.

The spelling of 442616665 in words is "four hundred forty-two million, six hundred sixteen thousand, six hundred sixty-five".