266465669 has 2 divisors, whose sum is σ = 266465670. Its totient is φ = 266465668.

The previous prime is 266465663. The next prime is 266465681. The reversal of 266465669 is 966564662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234396100 + 32069569 = 15310^2 + 5663^2 .

It is a cyclic number.

It is not a de Polignac number, because 266465669 - 2²⁰ = 265417093 is a prime.

It is a super-2 number, since 2×266465669² = 142007905511235122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266465663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133232834 + 133232835.

It is an arithmetic number, because the mean of its divisors is an integer number (133232835).

Almost surely, 2^266465669 is an apocalyptic number.

It is an amenable number.

266465669 is a deficient number, since it is larger than the sum of its proper divisors (1).

266465669 is an equidigital number, since it uses as much as digits as its factorization.

266465669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 50.

The square root of 266465669 is about 16323.7761868999. The cubic root of 266465669 is about 643.4978314944.

The spelling of 266465669 in words is "two hundred sixty-six million, four hundred sixty-five thousand, six hundred sixty-nine".