12660499 has 4 divisors (see below), whose sum is σ = 12701520. Its totient is φ = 12619480.

The previous prime is 12660467. The next prime is 12660523. The reversal of 12660499 is 99406621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99406621 = 23 ⋅4322027.

It is a cyclic number.

It is not a de Polignac number, because 12660499 - 2⁵ = 12660467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20044 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (3175380).

Almost surely, 2^12660499 is an apocalyptic number.

12660499 is a deficient number, since it is larger than the sum of its proper divisors (41021).

12660499 is an equidigital number, since it uses as much as digits as its factorization.

12660499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41020.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 12660499 is about 3558.1594961440. The cubic root of 12660499 is about 233.0685142996.

The spelling of 12660499 in words is "twelve million, six hundred sixty thousand, four hundred ninety-nine".