266256607 has 2 divisors, whose sum is σ = 266256608. Its totient is φ = 266256606.

The previous prime is 266256587. The next prime is 266256629. The reversal of 266256607 is 706652662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266256607 is a prime.

It is a Chen prime.

It is equal to p_14518786 and since 266256607 and 14518786 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266256607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266256647) 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, 133128303 + 133128304.

It is an arithmetic number, because the mean of its divisors is an integer number (133128304).

Almost surely, 2^266256607 is an apocalyptic number.

266256607 is a deficient number, since it is larger than the sum of its proper divisors (1).

266256607 is an equidigital number, since it uses as much as digits as its factorization.

266256607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 266256607 is about 16317.3713262890. The cubic root of 266256607 is about 643.3294969360.

The spelling of 266256607 in words is "two hundred sixty-six million, two hundred fifty-six thousand, six hundred seven".