6668957 has 2 divisors, whose sum is σ = 6668958. Its totient is φ = 6668956.

The previous prime is 6668953. The next prime is 6668969. The reversal of 6668957 is 7598666.

6668957 is nontrivially palindromic in base 7.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6661561 + 7396 = 2581^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 6668957 - 2² = 6668953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334478 + 3334479.

It is an arithmetic number, because the mean of its divisors is an integer number (3334479).

Almost surely, 2^6668957 is an apocalyptic number.

It is an amenable number.

6668957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668957 is an equidigital number, since it uses as much as digits as its factorization.

6668957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 6668957 is about 2582.4323805281. The cubic root of 6668957 is about 188.2287561704.

The spelling of 6668957 in words is "six million, six hundred sixty-eight thousand, nine hundred fifty-seven".