266331427 has 2 divisors, whose sum is σ = 266331428. Its totient is φ = 266331426.

The previous prime is 266331419. The next prime is 266331491. The reversal of 266331427 is 724133662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266331427 - 2³ = 266331419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266331392 and 266331401.

It is not a weakly prime, because it can be changed into another prime (266331497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133165713 + 133165714.

It is an arithmetic number, because the mean of its divisors is an integer number (133165714).

Almost surely, 2^266331427 is an apocalyptic number.

266331427 is a deficient number, since it is larger than the sum of its proper divisors (1).

266331427 is an equidigital number, since it uses as much as digits as its factorization.

266331427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 34.

The square root of 266331427 is about 16319.6638139393. The cubic root of 266331427 is about 643.3897513469.

The spelling of 266331427 in words is "two hundred sixty-six million, three hundred thirty-one thousand, four hundred twenty-seven".