12766656 has 168 divisors, whose sum is σ = 41696640. Its totient is φ = 3429888.

The previous prime is 12766639. The next prime is 12766667. The reversal of 12766656 is 65666721.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216355 + ... + 216413.

Almost surely, 2^12766656 is an apocalyptic number.

12766656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12766656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20848320).

12766656 is an abundant number, since it is smaller than the sum of its proper divisors (28929984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12766656 is a wasteful number, since it uses less digits than its factorization.

12766656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 94 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 12766656 is about 3573.0457595726. The cubic root of 12766656 is about 233.7181206584.

The spelling of 12766656 in words is "twelve million, seven hundred sixty-six thousand, six hundred fifty-six".