12166660 has 48 divisors (see below), whose sum is σ = 28848960. Its totient is φ = 4269440.

The previous prime is 12166607. The next prime is 12166667. The reversal of 12166660 is 6666121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5427 + ... + 7333.

It is an arithmetic number, because the mean of its divisors is an integer number (601020).

Almost surely, 2^12166660 is an apocalyptic number.

12166660 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 12166660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14424480).

12166660 is an abundant number, since it is smaller than the sum of its proper divisors (16682300).

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

12166660 is a wasteful number, since it uses less digits than its factorization.

12166660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12166660 is about 3488.0739671056. The cubic root of 12166660 is about 229.9978575730.

The spelling of 12166660 in words is "twelve million, one hundred sixty-six thousand, six hundred sixty".