6642323 has 4 divisors (see below), whose sum is σ = 6650160. Its totient is φ = 6634488.

The previous prime is 6642319. The next prime is 6642329. The reversal of 6642323 is 3232466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6642323 - 2² = 6642319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6642292 and 6642301.

It is not an unprimeable number, because it can be changed into a prime (6642329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 4401.

It is an arithmetic number, because the mean of its divisors is an integer number (1662540).

Almost surely, 2^6642323 is an apocalyptic number.

6642323 is a deficient number, since it is larger than the sum of its proper divisors (7837).

6642323 is an equidigital number, since it uses as much as digits as its factorization.

6642323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836.

The product of its digits is 5184, while the sum is 26.

The square root of 6642323 is about 2577.2704553461. The cubic root of 6642323 is about 187.9778436995.

Adding to 6642323 its reverse (3232466), we get a palindrome (9874789).

The spelling of 6642323 in words is "six million, six hundred forty-two thousand, three hundred twenty-three".