12660726505 has 8 divisors (see below), whose sum is σ = 17363282112. Its totient is φ = 8681641008.

The previous prime is 12660726479. The next prime is 12660726517. The reversal of 12660726505 is 50562706621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12660726505 - 2⁹ = 12660725993 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 180867487 + ... + 180867556.

It is an arithmetic number, because the mean of its divisors is an integer number (2170410264).

Almost surely, 2^12660726505 is an apocalyptic number.

It is an amenable number.

12660726505 is a deficient number, since it is larger than the sum of its proper divisors (4702555607).

12660726505 is an equidigital number, since it uses as much as digits as its factorization.

12660726505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361735055.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 12660726505 in words is "twelve billion, six hundred sixty million, seven hundred twenty-six thousand, five hundred five".