268666877 has 2 divisors, whose sum is σ = 268666878. Its totient is φ = 268666876.

The previous prime is 268666837. The next prime is 268666889. The reversal of 268666877 is 778666862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218271076 + 50395801 = 14774^2 + 7099^2 .

It is a cyclic number.

It is not a de Polignac number, because 268666877 - 2⁶ = 268666813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268666837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134333438 + 134333439.

It is an arithmetic number, because the mean of its divisors is an integer number (134333439).

Almost surely, 2^268666877 is an apocalyptic number.

It is an amenable number.

268666877 is a deficient number, since it is larger than the sum of its proper divisors (1).

268666877 is an equidigital number, since it uses as much as digits as its factorization.

268666877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 56.

The square root of 268666877 is about 16391.0608869591. The cubic root of 268666877 is about 645.2649009055.

The spelling of 268666877 in words is "two hundred sixty-eight million, six hundred sixty-six thousand, eight hundred seventy-seven".