6644271 has 4 divisors (see below), whose sum is σ = 8859032. Its totient is φ = 4429512.

The previous prime is 6644269. The next prime is 6644273. The reversal of 6644271 is 1724466.

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

It is an interprime number because it is at equal distance from previous prime (6644269) and next prime (6644273).

It is not a de Polignac number, because 6644271 - 2¹ = 6644269 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644273) 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, 1107376 + ... + 1107381.

It is an arithmetic number, because the mean of its divisors is an integer number (2214758).

Almost surely, 2^6644271 is an apocalyptic number.

6644271 is a deficient number, since it is larger than the sum of its proper divisors (2214761).

6644271 is a wasteful number, since it uses less digits than its factorization.

6644271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214760.

The product of its digits is 8064, while the sum is 30.

The square root of 6644271 is about 2577.6483468464. The cubic root of 6644271 is about 187.9962180468.

The spelling of 6644271 in words is "six million, six hundred forty-four thousand, two hundred seventy-one".