12661760 has 44 divisors (see below), whose sum is σ = 30385668. Its totient is φ = 5062656.

The previous prime is 12661741. The next prime is 12661769. The reversal of 12661760 is 6716621.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 5607424 = 2656^2 + 2368^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3884 + ... + 6356.

Almost surely, 2^12661760 is an apocalyptic number.

12661760 is a gapful number since it is divisible by the number (10) 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 12661760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15192834).

12661760 is an abundant number, since it is smaller than the sum of its proper divisors (17723908).

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

12661760 is an equidigital number, since it uses as much as digits as its factorization.

12661760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 12661760 is about 3558.3366900843. The cubic root of 12661760 is about 233.0762520051.

The spelling of 12661760 in words is "twelve million, six hundred sixty-one thousand, seven hundred sixty".