12651663 has 16 divisors (see below), whose sum is σ = 17873280. Its totient is φ = 7938144.

The previous prime is 12651659. The next prime is 12651697. The reversal of 12651663 is 36615621.

It is not a de Polignac number, because 12651663 - 2² = 12651659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12651663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9220 + ... + 10502.

It is an arithmetic number, because the mean of its divisors is an integer number (1117080).

Almost surely, 2^12651663 is an apocalyptic number.

12651663 is a deficient number, since it is larger than the sum of its proper divisors (5221617).

12651663 is a wasteful number, since it uses less digits than its factorization.

12651663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478.

The product of its digits is 6480, while the sum is 30.

The square root of 12651663 is about 3556.9176262601. The cubic root of 12651663 is about 233.0142807164.

The spelling of 12651663 in words is "twelve million, six hundred fifty-one thousand, six hundred sixty-three".