6667949 has 2 divisors, whose sum is σ = 6667950. Its totient is φ = 6667948.

The previous prime is 6667933. The next prime is 6667951. The reversal of 6667949 is 9497666.

6667949 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6666724 + 1225 = 2582^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667949 - 2⁴ = 6667933 is a prime.

Together with 6667951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333974 + 3333975.

It is an arithmetic number, because the mean of its divisors is an integer number (3333975).

Almost surely, 2^6667949 is an apocalyptic number.

It is an amenable number.

6667949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667949 is an equidigital number, since it uses as much as digits as its factorization.

6667949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 6667949 is about 2582.2372083138. The cubic root of 6667949 is about 188.2192722213.

The spelling of 6667949 in words is "six million, six hundred sixty-seven thousand, nine hundred forty-nine".