450405665 has 16 divisors (see below), whose sum is σ = 582183936. Its totient is φ = 333537600.

The previous prime is 450405643. The next prime is 450405689. The reversal of 450405665 is 566504054.

It is not a de Polignac number, because 450405665 - 2¹⁰ = 450404641 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, 59606 + ... + 66735.

It is an arithmetic number, because the mean of its divisors is an integer number (36386496).

Almost surely, 2^450405665 is an apocalyptic number.

It is an amenable number.

450405665 is a deficient number, since it is larger than the sum of its proper divisors (131778271).

450405665 is a wasteful number, since it uses less digits than its factorization.

450405665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126400.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 450405665 is about 21222.7628974175. The cubic root of 450405665 is about 766.5396335417.

It can be divided in two parts, 45040 and 5665, that added together give a palindrome (50705).

The spelling of 450405665 in words is "four hundred fifty million, four hundred five thousand, six hundred sixty-five".