3201660 has 216 divisors, whose sum is σ = 12736080. Its totient is φ = 665280.

The previous prime is 3201643. The next prime is 3201689. The reversal of 3201660 is 661023.

It is a happy number.

3201660 is a `hidden beast` number, since 3 + 2 + 0 + 1 + 660 = 666.

3201660 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 291055 + ... + 291065.

Almost surely, 2^3201660 is an apocalyptic number.

3201660 is a gapful number since it is divisible by the number (30) 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 3201660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6368040).

3201660 is an abundant number, since it is smaller than the sum of its proper divisors (9534420).

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

3201660 is a wasteful number, since it uses less digits than its factorization.

3201660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3201660 is about 1789.3183059478. The cubic root of 3201660 is about 147.3867367586.

Adding to 3201660 its reverse (661023), we get a palindrome (3862683).

The spelling of 3201660 in words is "three million, two hundred one thousand, six hundred sixty".