12616665 has 16 divisors (see below), whose sum is σ = 21249600. Its totient is φ = 6374592.

The previous prime is 12616649. The next prime is 12616687. The reversal of 12616665 is 56661621.

It is not a de Polignac number, because 12616665 - 2⁴ = 12616649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21850 + ... + 22419.

It is an arithmetic number, because the mean of its divisors is an integer number (1328100).

Almost surely, 2^12616665 is an apocalyptic number.

12616665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12616665 is a deficient number, since it is larger than the sum of its proper divisors (8632935).

12616665 is a wasteful number, since it uses less digits than its factorization.

12616665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44296.

The product of its digits is 12960, while the sum is 33.

The square root of 12616665 is about 3551.9945101309. The cubic root of 12616665 is about 232.7992216351.

The spelling of 12616665 in words is "twelve million, six hundred sixteen thousand, six hundred sixty-five".