266942247137 has 4 divisors (see below), whose sum is σ = 267039214020. Its totient is φ = 266845280256.

The previous prime is 266942247133. The next prime is 266942247149. The reversal of 266942247137 is 731742249662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731742249662 = 2 ⋅365871124831.

It can be written as a sum of positive squares in 2 ways, for example, as 215696153761 + 51246093376 = 464431^2 + 226376^2 .

It is a cyclic number.

It is not a de Polignac number, because 266942247137 - 2² = 266942247133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266942247133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48479312 + ... + 48484817.

It is an arithmetic number, because the mean of its divisors is an integer number (66759803505).

Almost surely, 2^266942247137 is an apocalyptic number.

It is an amenable number.

266942247137 is a deficient number, since it is larger than the sum of its proper divisors (96966883).

266942247137 is an equidigital number, since it uses as much as digits as its factorization.

266942247137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96966882.

The product of its digits is 6096384, while the sum is 53.

The spelling of 266942247137 in words is "two hundred sixty-six billion, nine hundred forty-two million, two hundred forty-seven thousand, one hundred thirty-seven".