12763566 has 48 divisors (see below), whose sum is σ = 29871504. Its totient is φ = 3923712.

The previous prime is 12763559. The next prime is 12763589. The reversal of 12763566 is 66536721.

12763566 is a `hidden beast` number, since 12 + 7 + 635 + 6 + 6 = 666.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 12763566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15825 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (622323).

Almost surely, 2^12763566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12763566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14935752).

12763566 is an abundant number, since it is smaller than the sum of its proper divisors (17107938).

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

12763566 is a wasteful number, since it uses less digits than its factorization.

12763566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 862 counting only the distinct ones).

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

The square root of 12763566 is about 3572.6133292031. The cubic root of 12763566 is about 233.6992630117.

The spelling of 12763566 in words is "twelve million, seven hundred sixty-three thousand, five hundred sixty-six".