6667849 has 8 divisors (see below), whose sum is σ = 6818760. Its totient is φ = 6518400.

The previous prime is 6667819. The next prime is 6667853. The reversal of 6667849 is 9487666.

It can be written as a sum of positive squares in 4 ways, for example, as 11449 + 6656400 = 107^2 + 2580^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6667849 - 2⁷ = 6667721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6667799 and 6667808.

It is not an unprimeable number, because it can be changed into a prime (6667819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16947 + ... + 17335.

It is an arithmetic number, because the mean of its divisors is an integer number (852345).

Almost surely, 2^6667849 is an apocalyptic number.

It is an amenable number.

6667849 is a deficient number, since it is larger than the sum of its proper divisors (150911).

6667849 is a wasteful number, since it uses less digits than its factorization.

6667849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

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

The square root of 6667849 is about 2582.2178451866. The cubic root of 6667849 is about 188.2183313012.

It can be divided in two parts, 666 and 7849, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 6667849 in words is "six million, six hundred sixty-seven thousand, eight hundred forty-nine".