12766563 has 12 divisors (see below), whose sum is σ = 18833568. Its totient is φ = 8329680.

The previous prime is 12766561. The next prime is 12766573. The reversal of 12766563 is 36566721.

12766563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12766563 - 2¹ = 12766561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12766561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14668 + ... + 15513.

It is an arithmetic number, because the mean of its divisors is an integer number (1569464).

Almost surely, 2^12766563 is an apocalyptic number.

12766563 is a deficient number, since it is larger than the sum of its proper divisors (6067005).

12766563 is a wasteful number, since it uses less digits than its factorization.

12766563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30234 (or 30231 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 12766563 is about 3573.0327454419. The cubic root of 12766563 is about 233.7175531426.

The spelling of 12766563 in words is "twelve million, seven hundred sixty-six thousand, five hundred sixty-three".