6668249 has 8 divisors (see below), whose sum is σ = 7728768. Its totient is φ = 5634720.

The previous prime is 6668237. The next prime is 6668257. The reversal of 6668249 is 9428666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6668249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6212 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (966096).

Almost surely, 2^6668249 is an apocalyptic number.

It is an amenable number.

6668249 is a deficient number, since it is larger than the sum of its proper divisors (1060519).

6668249 is a wasteful number, since it uses less digits than its factorization.

6668249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13495.

The product of its digits is 124416, while the sum is 41.

The square root of 6668249 is about 2582.2952968241. The cubic root of 6668249 is about 188.2220949251. Note that the first 3 decimals are identical.

The spelling of 6668249 in words is "six million, six hundred sixty-eight thousand, two hundred forty-nine".