660344441975 has 6 divisors (see below), whose sum is σ = 818827108080. Its totient is φ = 528275553560.

The previous prime is 660344441947. The next prime is 660344442007. The reversal of 660344441975 is 579144443066.

It is a happy number.

It is not a de Polignac number, because 660344441975 - 2¹⁴ = 660344425591 is a prime.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 13206888815 + ... + 13206888864.

It is an arithmetic number, because the mean of its divisors is an integer number (136471184680).

Almost surely, 2^660344441975 is an apocalyptic number.

660344441975 is a deficient number, since it is larger than the sum of its proper divisors (158482666105).

660344441975 is a wasteful number, since it uses less digits than its factorization.

660344441975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26413777689 (or 26413777684 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 660344441975 in words is "six hundred sixty billion, three hundred forty-four million, four hundred forty-one thousand, nine hundred seventy-five".