6645233 has 6 divisors (see below), whose sum is σ = 7730226. Its totient is φ = 5695872.

The previous prime is 6645227. The next prime is 6645259. The reversal of 6645233 is 3325466.

It can be written as a sum of positive squares in only one way, i.e., 4986289 + 1658944 = 2233^2 + 1288^2 .

It is not a de Polignac number, because 6645233 - 2⁴ = 6645217 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6645196 and 6645205.

It is not an unprimeable number, because it can be changed into a prime (6645293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67760 + ... + 67857.

It is an arithmetic number, because the mean of its divisors is an integer number (1288371).

Almost surely, 2^6645233 is an apocalyptic number.

It is an amenable number.

6645233 is a deficient number, since it is larger than the sum of its proper divisors (1084993).

6645233 is a wasteful number, since it uses less digits than its factorization.

6645233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135631 (or 135624 counting only the distinct ones).

The product of its digits is 12960, while the sum is 29.

The square root of 6645233 is about 2577.8349442895. The cubic root of 6645233 is about 188.0052907067.

The spelling of 6645233 in words is "six million, six hundred forty-five thousand, two hundred thirty-three".