6668243 has 4 divisors (see below), whose sum is σ = 6727368. Its totient is φ = 6609120.

The previous prime is 6668237. The next prime is 6668257. The reversal of 6668243 is 3428666.

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

It is a cyclic number.

It is not a de Polignac number, because 6668243 - 2¹⁶ = 6602707 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 6⁸ + 6⁸ + 8⁵ + 2¹¹ + 4⁴ + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29393 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (1681842).

Almost surely, 2^6668243 is an apocalyptic number.

6668243 is a deficient number, since it is larger than the sum of its proper divisors (59125).

6668243 is a wasteful number, since it uses less digits than its factorization.

6668243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59124.

The product of its digits is 41472, while the sum is 35.

The square root of 6668243 is about 2582.2941350667. The cubic root of 6668243 is about 188.2220384718. Note that the first 3 decimals are identical.

The spelling of 6668243 in words is "six million, six hundred sixty-eight thousand, two hundred forty-three".