6669249 has 8 divisors (see below), whose sum is σ = 8910240. Its totient is φ = 4437216.

The previous prime is 6669239. The next prime is 6669251. The reversal of 6669249 is 9429666.

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

It is not a de Polignac number, because 6669249 - 2⁴ = 6669233 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

6669249 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6669249.

It is not an unprimeable number, because it can be changed into a prime (6669239) 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, 247 + ... + 3660.

It is an arithmetic number, because the mean of its divisors is an integer number (1113780).

Almost surely, 2^6669249 is an apocalyptic number.

It is an amenable number.

6669249 is a deficient number, since it is larger than the sum of its proper divisors (2240991).

6669249 is a wasteful number, since it uses less digits than its factorization.

6669249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479.

The product of its digits is 139968, while the sum is 42.

The square root of 6669249 is about 2582.4889157555. The cubic root of 6669249 is about 188.2315033263.

The spelling of 6669249 in words is "six million, six hundred sixty-nine thousand, two hundred forty-nine".