12580538666 has 32 divisors (see below), whose sum is σ = 20826201600. Its totient is φ = 5673008880.

The previous prime is 12580538629. The next prime is 12580538693. The reversal of 12580538666 is 66683508521.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150305 + ... + 218523.

It is an arithmetic number, because the mean of its divisors is an integer number (650818800).

Almost surely, 2^12580538666 is an apocalyptic number.

12580538666 is a deficient number, since it is larger than the sum of its proper divisors (8245662934).

12580538666 is a wasteful number, since it uses less digits than its factorization.

12580538666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68474.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 12580538666 in words is "twelve billion, five hundred eighty million, five hundred thirty-eight thousand, six hundred sixty-six".