6661328 has 10 divisors (see below), whose sum is σ = 12906354. Its totient is φ = 3330656.

The previous prime is 6661327. The next prime is 6661337. The reversal of 6661328 is 8231666.

It can be written as a sum of positive squares in only one way, i.e., 5053504 + 1607824 = 2248^2 + 1268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6661294 and 6661303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208151 + ... + 208182.

Almost surely, 2^6661328 is an apocalyptic number.

It is an amenable number.

6661328 is a deficient number, since it is larger than the sum of its proper divisors (6245026).

6661328 is a wasteful number, since it uses less digits than its factorization.

6661328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416341 (or 416335 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 6661328 is about 2580.9548620617. The cubic root of 6661328 is about 188.1569535830.

The spelling of 6661328 in words is "six million, six hundred sixty-one thousand, three hundred twenty-eight".