12665548 has 48 divisors (see below), whose sum is σ = 26901504. Its totient is φ = 5100480.

The previous prime is 12665531. The next prime is 12665557. The reversal of 12665548 is 84556621.

It is a super-2 number, since 2×12665548² = 320832212280608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45586 + ... + 45862.

It is an arithmetic number, because the mean of its divisors is an integer number (560448).

Almost surely, 2^12665548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12665548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13450752).

12665548 is an abundant number, since it is smaller than the sum of its proper divisors (14235956).

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

12665548 is a wasteful number, since it uses less digits than its factorization.

12665548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 380 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 12665548 is about 3558.8689214412. The cubic root of 12665548 is about 233.0994927134.

The spelling of 12665548 in words is "twelve million, six hundred sixty-five thousand, five hundred forty-eight".