266479991069 has 2 divisors, whose sum is σ = 266479991070. Its totient is φ = 266479991068.

The previous prime is 266479991039. The next prime is 266479991111. The reversal of 266479991069 is 960199974662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265255900900 + 1224090169 = 515030^2 + 34987^2 .

It is a cyclic number.

It is not a de Polignac number, because 266479991069 - 2²⁰ = 266478942493 is a prime.

It is a super-2 number, since 2×266479991069² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266479991039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133239995534 + 133239995535.

It is an arithmetic number, because the mean of its divisors is an integer number (133239995535).

Almost surely, 2^266479991069 is an apocalyptic number.

It is an amenable number.

266479991069 is a deficient number, since it is larger than the sum of its proper divisors (1).

266479991069 is an equidigital number, since it uses as much as digits as its factorization.

266479991069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 68.

The spelling of 266479991069 in words is "two hundred sixty-six billion, four hundred seventy-nine million, nine hundred ninety-one thousand, sixty-nine".