266870831 has 2 divisors, whose sum is σ = 266870832. Its totient is φ = 266870830.

The previous prime is 266870819. The next prime is 266870867. The reversal of 266870831 is 138078662.

It is a happy number.

266870831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266870831 - 2⁶ = 266870767 is a prime.

It is a super-2 number, since 2×266870831² = 142440080877261122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266870801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133435415 + 133435416.

It is an arithmetic number, because the mean of its divisors is an integer number (133435416).

Almost surely, 2^266870831 is an apocalyptic number.

266870831 is a deficient number, since it is larger than the sum of its proper divisors (1).

266870831 is an equidigital number, since it uses as much as digits as its factorization.

266870831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 266870831 is about 16336.1816530057. The cubic root of 266870831 is about 643.8238132473.

The spelling of 266870831 in words is "two hundred sixty-six million, eight hundred seventy thousand, eight hundred thirty-one".