12061660 has 48 divisors (see below), whose sum is σ = 28478016. Its totient is φ = 4257792.

The previous prime is 12061649. The next prime is 12061661. The reversal of 12061660 is 6616021.

12061660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12061661) by changing a digit.

It is a nontrivial repunit in base 229.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4972 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (593292).

Almost surely, 2^12061660 is an apocalyptic number.

12061660 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 12061660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14239008).

12061660 is an abundant number, since it is smaller than the sum of its proper divisors (16416356).

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

12061660 is a wasteful number, since it uses less digits than its factorization.

12061660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2060 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12061660 is about 3472.9900662110. The cubic root of 12061660 is about 229.3343070162.

Adding to 12061660 its reverse (6616021), we get a palindrome (18677681).

It can be divided in two parts, 12061 and 660, that added together give a palindrome (12721).

The spelling of 12061660 in words is "twelve million, sixty-one thousand, six hundred sixty".