266465663 has 2 divisors, whose sum is σ = 266465664. Its totient is φ = 266465662.

The previous prime is 266465611. The next prime is 266465669. The reversal of 266465663 is 366564662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266465663 - 2¹⁸ = 266203519 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266465669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133232831 + 133232832.

It is an arithmetic number, because the mean of its divisors is an integer number (133232832).

Almost surely, 2^266465663 is an apocalyptic number.

266465663 is a deficient number, since it is larger than the sum of its proper divisors (1).

266465663 is an equidigital number, since it uses as much as digits as its factorization.

266465663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 44.

The square root of 266465663 is about 16323.7760031189. The cubic root of 266465663 is about 643.4978266645.

The spelling of 266465663 in words is "two hundred sixty-six million, four hundred sixty-five thousand, six hundred sixty-three".