6660441 has 8 divisors (see below), whose sum is σ = 9867360. Its totient is φ = 4440276.

The previous prime is 6660427. The next prime is 6660473. The reversal of 6660441 is 1440666.

It is not a de Polignac number, because 6660441 - 2⁶ = 6660377 is a prime.

It is a super-2 number, since 2×6660441² = 88722948628962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 246683 = 6660441 / (6 + 6 + 6 + 0 + 4 + 4 + 1).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6660421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123315 + ... + 123368.

It is an arithmetic number, because the mean of its divisors is an integer number (1233420).

Almost surely, 2^6660441 is an apocalyptic number.

It is an amenable number.

6660441 is a deficient number, since it is larger than the sum of its proper divisors (3206919).

6660441 is a wasteful number, since it uses less digits than its factorization.

6660441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246692 (or 246686 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6660441 is about 2580.7830207129. The cubic root of 6660441 is about 188.1486017636.

The spelling of 6660441 in words is "six million, six hundred sixty thousand, four hundred forty-one".