266195115457 has 2 divisors, whose sum is σ = 266195115458. Its totient is φ = 266195115456.

The previous prime is 266195115443. The next prime is 266195115523. The reversal of 266195115457 is 754511591662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164283491761 + 101911623696 = 405319^2 + 319236^2 .

It is a cyclic number.

It is not a de Polignac number, because 266195115457 - 2¹⁵ = 266195082689 is a prime.

It is not a weakly prime, because it can be changed into another prime (266195115257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133097557728 + 133097557729.

It is an arithmetic number, because the mean of its divisors is an integer number (133097557729).

Almost surely, 2^266195115457 is an apocalyptic number.

It is an amenable number.

266195115457 is a deficient number, since it is larger than the sum of its proper divisors (1).

266195115457 is an equidigital number, since it uses as much as digits as its factorization.

266195115457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 52.

The spelling of 266195115457 in words is "two hundred sixty-six billion, one hundred ninety-five million, one hundred fifteen thousand, four hundred fifty-seven".