12666602116 has 27 divisors (see below), whose sum is σ = 25788790839. Its totient is φ = 5427868488.

The previous prime is 12666602041. The next prime is 12666602153. The reversal of 12666602116 is 61120666621.

The square root of 12666602116 is 112546.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1571625 + ... + 1579663.

Almost surely, 2^12666602116 is an apocalyptic number.

12666602116 is the 112546-th square number.

It is an amenable number.

12666602116 is an abundant number, since it is smaller than the sum of its proper divisors (13122188723).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666602116 is an frugal number, since it uses more digits than its factorization.

12666602116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16096 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 12666602116 in words is "twelve billion, six hundred sixty-six million, six hundred two thousand, one hundred sixteen".