266056447 has 2 divisors, whose sum is σ = 266056448. Its totient is φ = 266056446.

The previous prime is 266056391. The next prime is 266056451. The reversal of 266056447 is 744650662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266056447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266054447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133028223 + 133028224.

It is an arithmetic number, because the mean of its divisors is an integer number (133028224).

Almost surely, 2^266056447 is an apocalyptic number.

266056447 is a deficient number, since it is larger than the sum of its proper divisors (1).

266056447 is an equidigital number, since it uses as much as digits as its factorization.

266056447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 266056447 is about 16311.2368323190. The cubic root of 266056447 is about 643.1682475876.

The spelling of 266056447 in words is "two hundred sixty-six million, fifty-six thousand, four hundred forty-seven".