659907916945 has 4 divisors (see below), whose sum is σ = 791889500340. Its totient is φ = 527926333552.

The previous prime is 659907916891. The next prime is 659907916963. The reversal of 659907916945 is 549619709956.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120993361281 + 538914555664 = 347841^2 + 734108^2 .

It is a cyclic number.

It is not a de Polignac number, because 659907916945 - 2¹³ = 659907908753 is a prime.

It is an unprimeable number.

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, 65990791690 + ... + 65990791699.

It is an arithmetic number, because the mean of its divisors is an integer number (197972375085).

Almost surely, 2^659907916945 is an apocalyptic number.

It is an amenable number.

659907916945 is a deficient number, since it is larger than the sum of its proper divisors (131981583395).

659907916945 is a wasteful number, since it uses less digits than its factorization.

659907916945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131981583394.

The product of its (nonzero) digits is 165337200, while the sum is 70.

The spelling of 659907916945 in words is "six hundred fifty-nine billion, nine hundred seven million, nine hundred sixteen thousand, nine hundred forty-five".