6668947 has 16 divisors (see below), whose sum is σ = 7365600. Its totient is φ = 6013440.

The previous prime is 6668939. The next prime is 6668951. The reversal of 6668947 is 7498666.

It is a cyclic number.

It is not a de Polignac number, because 6668947 - 2³ = 6668939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6668897 and 6668906.

It is not an unprimeable number, because it can be changed into a prime (6668957) 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, 61129 + ... + 61237.

It is an arithmetic number, because the mean of its divisors is an integer number (460350).

Almost surely, 2^6668947 is an apocalyptic number.

6668947 is a deficient number, since it is larger than the sum of its proper divisors (696653).

6668947 is a wasteful number, since it uses less digits than its factorization.

With its successor (6668948) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (246).

6668947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its digits is 435456, while the sum is 46.

The square root of 6668947 is about 2582.4304443683. The cubic root of 6668947 is about 188.2286620883.

The spelling of 6668947 in words is "six million, six hundred sixty-eight thousand, nine hundred forty-seven".