665603530530 has 64 divisors (see below), whose sum is σ = 1649105740800. Its totient is φ = 171755458560.

The previous prime is 665603530519. The next prime is 665603530567. The reversal of 665603530530 is 35035306566.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19670266 + ... + 19704074.

It is an arithmetic number, because the mean of its divisors is an integer number (25767277200).

Almost surely, 2^665603530530 is an apocalyptic number.

665603530530 is an abundant number, since it is smaller than the sum of its proper divisors (983502210270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665603530530 is a wasteful number, since it uses less digits than its factorization.

665603530530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55019.

The product of its (nonzero) digits is 729000, while the sum is 42.

The spelling of 665603530530 in words is "six hundred sixty-five billion, six hundred three million, five hundred thirty thousand, five hundred thirty".