6645433 has 4 divisors (see below), whose sum is σ = 6663168. Its totient is φ = 6627700.

The previous prime is 6645391. The next prime is 6645461. The reversal of 6645433 is 3345466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6645433 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 6⁴ + 6⁸ + 4⁴ + 5⁵ + 4⁵ + 3¹¹ + 3¹⁴ .

It is a Duffinian number.

6645433 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6645395 and 6645404.

It is not an unprimeable number, because it can be changed into a prime (6645493) 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 3 ways as a sum of consecutive naturals, for example, 8293 + ... + 9058.

It is an arithmetic number, because the mean of its divisors is an integer number (1665792).

Almost surely, 2^6645433 is an apocalyptic number.

It is an amenable number.

6645433 is a deficient number, since it is larger than the sum of its proper divisors (17735).

6645433 is a wasteful number, since it uses less digits than its factorization.

6645433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17734.

The product of its digits is 25920, while the sum is 31.

The square root of 6645433 is about 2577.8737362408. The cubic root of 6645433 is about 188.0071768046.

The spelling of 6645433 in words is "six million, six hundred forty-five thousand, four hundred thirty-three".