1660556516516 has 12 divisors (see below), whose sum is σ = 2910714485532. Its totient is φ = 828923806368.

The previous prime is 1660556516497. The next prime is 1660556516527. The reversal of 1660556516516 is 6156156550661.

It can be written as a sum of positive squares in 2 ways, for example, as 562944087616 + 1097612428900 = 750296^2 + 1047670^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338610215 + ... + 338615118.

It is an arithmetic number, because the mean of its divisors is an integer number (242559540461).

Almost surely, 2^{1660556516516} is an apocalyptic number.

It is an amenable number.

1660556516516 is a deficient number, since it is larger than the sum of its proper divisors (1250157969016).

1660556516516 is a wasteful number, since it uses less digits than its factorization.

1660556516516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677225950 (or 677225948 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 1660556516516 in words is "one trillion, six hundred sixty billion, five hundred fifty-six million, five hundred sixteen thousand, five hundred sixteen".