665602360018312 has 16 divisors (see below), whose sum is σ = 1249784745194700. Its totient is φ = 332326427966400.

The previous prime is 665602360018261. The next prime is 665602360018313. The reversal of 665602360018312 is 213810063206566.

It can be written as a sum of positive squares in 2 ways, for example, as 650427798152196 + 15174561866116 = 25503486^2 + 3895454^2 .

It is not an unprimeable number, because it can be changed into a prime (665602360018313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59343999387 + ... + 59344010602.

Almost surely, 2^{665602360018312} is an apocalyptic number.

It is an amenable number.

665602360018312 is a deficient number, since it is larger than the sum of its proper divisors (584182385176388).

665602360018312 is a wasteful number, since it uses less digits than its factorization.

665602360018312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118688010696 (or 118688010692 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 665602360018312 in words is "six hundred sixty-five trillion, six hundred two billion, three hundred sixty million, eighteen thousand, three hundred twelve".