6664841 has 4 divisors (see below), whose sum is σ = 6758784. Its totient is φ = 6570900.

The previous prime is 6664831. The next prime is 6664843. The reversal of 6664841 is 1484666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1484666 = 2 ⋅742333.

It is a cyclic number.

It is not a de Polignac number, because 6664841 - 2¹⁴ = 6648457 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664843) 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 3 ways as a sum of consecutive naturals, for example, 46865 + ... + 47006.

It is an arithmetic number, because the mean of its divisors is an integer number (1689696).

Almost surely, 2^6664841 is an apocalyptic number.

It is an amenable number.

6664841 is a deficient number, since it is larger than the sum of its proper divisors (93943).

6664841 is an equidigital number, since it uses as much as digits as its factorization.

6664841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93942.

The product of its digits is 27648, while the sum is 35.

The square root of 6664841 is about 2581.6353344344. The cubic root of 6664841 is about 188.1900240266.

The spelling of 6664841 in words is "six million, six hundred sixty-four thousand, eight hundred forty-one".