6659712 has 128 divisors (see below), whose sum is σ = 20563200. Its totient is φ = 2119680.

The previous prime is 6659693. The next prime is 6659713. The reversal of 6659712 is 2179566.

6659712 is a `hidden beast` number, since 66 + 597 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6659713) 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, 141673 + ... + 141719.

It is an arithmetic number, because the mean of its divisors is an integer number (160650).

Almost surely, 2^6659712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6659712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10281600).

6659712 is an abundant number, since it is smaller than the sum of its proper divisors (13903488).

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

6659712 is a wasteful number, since it uses less digits than its factorization.

6659712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 93 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 6659712 is about 2580.6417806429. The cubic root of 6659712 is about 188.1417370863.

The spelling of 6659712 in words is "six million, six hundred fifty-nine thousand, seven hundred twelve".