3111660 has 72 divisors (see below), whose sum is σ = 9631440. Its totient is φ = 812928.

The previous prime is 3111659. The next prime is 3111673. The reversal of 3111660 is 661113.

3111660 is a `hidden beast` number, since 3 + 1 + 1 + 1 + 660 = 666.

3111660 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 23 ways as a sum of consecutive naturals, for example, 10474 + ... + 10766.

It is an arithmetic number, because the mean of its divisors is an integer number (133770).

Almost surely, 2^3111660 is an apocalyptic number.

3111660 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 3111660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4815720).

3111660 is an abundant number, since it is smaller than the sum of its proper divisors (6519780).

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

3111660 is a wasteful number, since it uses less digits than its factorization.

3111660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 3111660 is about 1763.9897958889. The cubic root of 3111660 is about 145.9925560726.

Adding to 3111660 its reverse (661113), we get a palindrome (3772773).

The spelling of 3111660 in words is "three million, one hundred eleven thousand, six hundred sixty".