6666797 has 2 divisors, whose sum is σ = 6666798. Its totient is φ = 6666796.

The previous prime is 6666791. The next prime is 6666833. The reversal of 6666797 is 7976666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6120676 + 546121 = 2474^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666797 - 2¹⁰ = 6665773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666791) 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 as a sum of consecutive naturals, namely, 3333398 + 3333399.

It is an arithmetic number, because the mean of its divisors is an integer number (3333399).

Almost surely, 2^6666797 is an apocalyptic number.

It is an amenable number.

6666797 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666797 is an equidigital number, since it uses as much as digits as its factorization.

6666797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 6666797 is about 2582.0141362897. The cubic root of 6666797 is about 188.2084322518.

The spelling of 6666797 in words is "six million, six hundred sixty-six thousand, seven hundred ninety-seven".