12660505 has 16 divisors (see below), whose sum is σ = 17849664. Its totient is φ = 8498880.

The previous prime is 12660467. The next prime is 12660523. The reversal of 12660505 is 50506621.

It is not a de Polignac number, because 12660505 - 2⁷ = 12660377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12660505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8139 + ... + 9568.

It is an arithmetic number, because the mean of its divisors is an integer number (1115604).

Almost surely, 2^12660505 is an apocalyptic number.

It is an amenable number.

12660505 is a deficient number, since it is larger than the sum of its proper divisors (5189159).

12660505 is a wasteful number, since it uses less digits than its factorization.

12660505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17736.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 12660505 is about 3558.1603392765. The cubic root of 12660505 is about 233.0685511178.

The spelling of 12660505 in words is "twelve million, six hundred sixty thousand, five hundred five".