6668949 has 16 divisors (see below), whose sum is σ = 10371200. Its totient is φ = 3810240.

The previous prime is 6668939. The next prime is 6668951. The reversal of 6668949 is 9498666.

It is not a de Polignac number, because 6668949 - 2⁷ = 6668821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6668898 and 6668907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668939) 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 15 ways as a sum of consecutive naturals, for example, 2212 + ... + 4269.

It is an arithmetic number, because the mean of its divisors is an integer number (648200).

Almost surely, 2^6668949 is an apocalyptic number.

It is an amenable number.

6668949 is a deficient number, since it is larger than the sum of its proper divisors (3702251).

6668949 is an equidigital number, since it uses as much as digits as its factorization.

6668949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6505 (or 6491 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 6668949 is about 2582.4308316003. The cubic root of 6668949 is about 188.2286809047.

The spelling of 6668949 in words is "six million, six hundred sixty-eight thousand, nine hundred forty-nine".