6659444 has 48 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 2741760.

The previous prime is 6659441. The next prime is 6659447. The reversal of 6659444 is 4449566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6659441) and next prime (6659447).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6659398 and 6659407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659441) 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 15 ways as a sum of consecutive naturals, for example, 21539 + ... + 21845.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

Almost surely, 2^6659444 is an apocalyptic number.

It is an amenable number.

6659444 is an abundant number, since it is smaller than the sum of its proper divisors (7311436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6659444 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (6659443) it forms an eRAP, since the sums of their prime factors are consecutive (367 and 368).

6659444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 6659444 is about 2580.5898550525. The cubic root of 6659444 is about 188.1392133204.

The spelling of 6659444 in words is "six million, six hundred fifty-nine thousand, four hundred forty-four".