6644071 has 4 divisors (see below), whose sum is σ = 7593232. Its totient is φ = 5694912.

The previous prime is 6644069. The next prime is 6644081. The reversal of 6644071 is 1704466.

6644071 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1704466 = 2 ⋅852233.

It is a cyclic number.

It is not a de Polignac number, because 6644071 - 2¹ = 6644069 is a prime.

It is a Duffinian number.

6644071 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644081) 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, 474570 + ... + 474583.

It is an arithmetic number, because the mean of its divisors is an integer number (1898308).

Almost surely, 2^6644071 is an apocalyptic number.

6644071 is a deficient number, since it is larger than the sum of its proper divisors (949161).

6644071 is an equidigital number, since it uses as much as digits as its factorization.

6644071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949160.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 6644071 is about 2577.6095515031. The cubic root of 6644071 is about 187.9943317289.

The spelling of 6644071 in words is "six million, six hundred forty-four thousand, seventy-one".