6661323 has 12 divisors (see below), whose sum is σ = 9754680. Its totient is φ = 4379616.

The previous prime is 6661313. The next prime is 6661327. The reversal of 6661323 is 3231666.

6661323 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 6661323 - 2⁴ = 6661307 is a prime.

It is a super-2 number, since 2×6661323² = 88746448220658, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 in 11 ways as a sum of consecutive naturals, for example, 4413 + ... + 5726.

It is an arithmetic number, because the mean of its divisors is an integer number (812890).

Almost surely, 2^6661323 is an apocalyptic number.

6661323 is a deficient number, since it is larger than the sum of its proper divisors (3093357).

6661323 is a wasteful number, since it uses less digits than its factorization.

6661323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218 (or 10215 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 6661323 is about 2580.9538934278. The cubic root of 6661323 is about 188.1569065061.

Adding to 6661323 its reverse (3231666), we get a palindrome (9892989).

The spelling of 6661323 in words is "six million, six hundred sixty-one thousand, three hundred twenty-three".