12766554 has 48 divisors (see below), whose sum is σ = 29432520. Its totient is φ = 3991680.

The previous prime is 12766553. The next prime is 12766561. The reversal of 12766554 is 45566721.

It is a happy number.

12766554 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12766329 + 225 = 3573^2 + 15^2 .

It is not an unprimeable number, because it can be changed into a prime (12766553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18984 + ... + 19644.

Almost surely, 2^12766554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12766554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14716260).

12766554 is an abundant number, since it is smaller than the sum of its proper divisors (16665966).

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

12766554 is a wasteful number, since it uses less digits than its factorization.

12766554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 732 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 12766554 is about 3573.0314860074. The cubic root of 12766554 is about 233.7174982215.

The spelling of 12766554 in words is "twelve million, seven hundred sixty-six thousand, five hundred fifty-four".