6644201 has 4 divisors (see below), whose sum is σ = 6823812. Its totient is φ = 6464592.

The previous prime is 6644191. The next prime is 6644227. The reversal of 6644201 is 1024466.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 1243225 = 2324^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 6644201 - 2²² = 2449897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6644101) 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, 89750 + ... + 89823.

It is an arithmetic number, because the mean of its divisors is an integer number (1705953).

Almost surely, 2^6644201 is an apocalyptic number.

It is an amenable number.

6644201 is a deficient number, since it is larger than the sum of its proper divisors (179611).

6644201 is a wasteful number, since it uses less digits than its factorization.

6644201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179610.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6644201 is about 2577.6347685427. The cubic root of 6644201 is about 187.9955578398.

Adding to 6644201 its reverse (1024466), we get a palindrome (7668667).

The spelling of 6644201 in words is "six million, six hundred forty-four thousand, two hundred one".