665587604033 has 4 divisors (see below), whose sum is σ = 726095568048. Its totient is φ = 605079640020.

The previous prime is 665587603943. The next prime is 665587604053. The reversal of 665587604033 is 330406785566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 665587604033 - 2⁸ = 665587603777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665587604053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30253981991 + ... + 30253982012.

It is an arithmetic number, because the mean of its divisors is an integer number (181523892012).

Almost surely, 2^665587604033 is an apocalyptic number.

It is an amenable number.

665587604033 is a deficient number, since it is larger than the sum of its proper divisors (60507964015).

665587604033 is a wasteful number, since it uses less digits than its factorization.

665587604033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60507964014.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 665587604033 in words is "six hundred sixty-five billion, five hundred eighty-seven million, six hundred four thousand, thirty-three".