6644331 has 12 divisors (see below), whose sum is σ = 10162152. Its totient is φ = 4168896.

The previous prime is 6644327. The next prime is 6644359. The reversal of 6644331 is 1334466.

It is not a de Polignac number, because 6644331 - 2² = 6644327 is a prime.

It is a super-2 number, since 2×6644331² = 88294268875122, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6644295 and 6644304.

It is not an unprimeable number, because it can be changed into a prime (6644311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21561 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (846846).

Almost surely, 2^6644331 is an apocalyptic number.

6644331 is a deficient number, since it is larger than the sum of its proper divisors (3517821).

6644331 is a wasteful number, since it uses less digits than its factorization.

6644331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43450 (or 43447 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 6644331 is about 2577.6599853355. The cubic root of 6644331 is about 187.9967839347.

Adding to 6644331 its reverse (1334466), we get a palindrome (7978797).

The spelling of 6644331 in words is "six million, six hundred forty-four thousand, three hundred thirty-one".