6668573 has 4 divisors (see below), whose sum is σ = 7060860. Its totient is φ = 6276288.

The previous prime is 6668567. The next prime is 6668603. The reversal of 6668573 is 3758666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5098564 + 1570009 = 2258^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 6668573 - 2⁶ = 6668509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6668573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668273) 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, 196118 + ... + 196151.

It is an arithmetic number, because the mean of its divisors is an integer number (1765215).

Almost surely, 2^6668573 is an apocalyptic number.

It is an amenable number.

6668573 is a deficient number, since it is larger than the sum of its proper divisors (392287).

6668573 is a wasteful number, since it uses less digits than its factorization.

6668573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392286.

The product of its digits is 181440, while the sum is 41.

The square root of 6668573 is about 2582.3580309477. The cubic root of 6668573 is about 188.2251433501.

The spelling of 6668573 in words is "six million, six hundred sixty-eight thousand, five hundred seventy-three".