12516665 has 8 divisors (see below), whose sum is σ = 17165760. Its totient is φ = 8582832.

The previous prime is 12516659. The next prime is 12516683. The reversal of 12516665 is 56661521.

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 12516665 - 2¹² = 12512569 is a prime.

It is a super-4 number, since 4×12516665⁴ (a number of 29 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178775 + ... + 178844.

It is an arithmetic number, because the mean of its divisors is an integer number (2145720).

Almost surely, 2^12516665 is an apocalyptic number.

It is an amenable number.

12516665 is a deficient number, since it is larger than the sum of its proper divisors (4649095).

12516665 is an equidigital number, since it uses as much as digits as its factorization.

12516665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357631.

The product of its digits is 10800, while the sum is 32.

The square root of 12516665 is about 3537.8899078405. The cubic root of 12516665 is about 232.1825319848.

The spelling of 12516665 in words is "twelve million, five hundred sixteen thousand, six hundred sixty-five".