12660365 has 16 divisors (see below), whose sum is σ = 16225920. Its totient is φ = 9455040.

The previous prime is 12660353. The next prime is 12660377. The reversal of 12660365 is 56306621.

12660365 = 443² + 444² + ... + 499².

It is an interprime number because it is at equal distance from previous prime (12660353) and next prime (12660377).

It is not a de Polignac number, because 12660365 - 2⁶ = 12660301 is a prime.

It is a congruent number.

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, 5807 + ... + 7683.

It is an arithmetic number, because the mean of its divisors is an integer number (1014120).

Almost surely, 2^12660365 is an apocalyptic number.

It is an amenable number.

12660365 is a deficient number, since it is larger than the sum of its proper divisors (3565555).

12660365 is a wasteful number, since it uses less digits than its factorization.

12660365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 12660365 is about 3558.1406661345. The cubic root of 12660365 is about 233.0676920231.

Adding to 12660365 its reverse (56306621), we get a palindrome (68966986).

The spelling of 12660365 in words is "twelve million, six hundred sixty thousand, three hundred sixty-five".