266353663 has 2 divisors, whose sum is σ = 266353664. Its totient is φ = 266353662.

The previous prime is 266353651. The next prime is 266353667. The reversal of 266353663 is 366353662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266353663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266353667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133176831 + 133176832.

It is an arithmetic number, because the mean of its divisors is an integer number (133176832).

Almost surely, 2^266353663 is an apocalyptic number.

266353663 is a deficient number, since it is larger than the sum of its proper divisors (1).

266353663 is an equidigital number, since it uses as much as digits as its factorization.

266353663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 40.

The square root of 266353663 is about 16320.3450637540. The cubic root of 266353663 is about 643.4076563767.

Subtracting 266353663 from its reverse (366353662), we obtain a palindrome (99999999).

The spelling of 266353663 in words is "two hundred sixty-six million, three hundred fifty-three thousand, six hundred sixty-three".