665429585 has 8 divisors (see below), whose sum is σ = 803602536. Its totient is φ = 528952320.

The previous prime is 665429579. The next prime is 665429651. The reversal of 665429585 is 585924566.

665429585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 87459904 + 577969681 = 9352^2 + 24041^2 .

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

It is not a de Polignac number, because 665429585 - 2²⁴ = 648652369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423056 + ... + 424625.

It is an arithmetic number, because the mean of its divisors is an integer number (100450317).

Almost surely, 2^665429585 is an apocalyptic number.

It is an amenable number.

665429585 is a deficient number, since it is larger than the sum of its proper divisors (138172951).

665429585 is a wasteful number, since it uses less digits than its factorization.

665429585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847843.

The product of its digits is 2592000, while the sum is 50.

The square root of 665429585 is about 25795.9218676131. The cubic root of 665429585 is about 873.0397849771.

The spelling of 665429585 in words is "six hundred sixty-five million, four hundred twenty-nine thousand, five hundred eighty-five".