665135530 has 16 divisors (see below), whose sum is σ = 1198738440. Its totient is φ = 265722112.

The previous prime is 665135509. The next prime is 665135543. The reversal of 665135530 is 35531566.

665135530 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 495641169 + 169494361 = 22263^2 + 13019^2 .

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, 33019 + ... + 49198.

Almost surely, 2^665135530 is an apocalyptic number.

665135530 is a deficient number, since it is larger than the sum of its proper divisors (533602910).

665135530 is a wasteful number, since it uses less digits than its factorization.

665135530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83033.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 665135530 is about 25790.2215965664. The cubic root of 665135530 is about 872.9111665406.

The spelling of 665135530 in words is "six hundred sixty-five million, one hundred thirty-five thousand, five hundred thirty".