266278867 has 2 divisors, whose sum is σ = 266278868. Its totient is φ = 266278866.

The previous prime is 266278823. The next prime is 266278877. The reversal of 266278867 is 768872662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266278867 - 2⁷ = 266278739 is a prime.

It is not a weakly prime, because it can be changed into another prime (266278877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133139433 + 133139434.

It is an arithmetic number, because the mean of its divisors is an integer number (133139434).

Almost surely, 2^266278867 is an apocalyptic number.

266278867 is a deficient number, since it is larger than the sum of its proper divisors (1).

266278867 is an equidigital number, since it uses as much as digits as its factorization.

266278867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 52.

The square root of 266278867 is about 16318.0534071929. The cubic root of 266278867 is about 643.3474246483.

The spelling of 266278867 in words is "two hundred sixty-six million, two hundred seventy-eight thousand, eight hundred sixty-seven".