266774606845 has 4 divisors (see below), whose sum is σ = 320129528220. Its totient is φ = 213419685472.

The previous prime is 266774606843. The next prime is 266774606893. The reversal of 266774606845 is 548606477662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29592944676 + 237181662169 = 172026^2 + 487013^2 .

It is a cyclic number.

It is not a de Polignac number, because 266774606845 - 2¹ = 266774606843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266774606843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26677460680 + ... + 26677460689.

It is an arithmetic number, because the mean of its divisors is an integer number (80032382055).

Almost surely, 2^266774606845 is an apocalyptic number.

It is an amenable number.

266774606845 is a deficient number, since it is larger than the sum of its proper divisors (53354921375).

266774606845 is an equidigital number, since it uses as much as digits as its factorization.

266774606845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53354921374.

The product of its (nonzero) digits is 81285120, while the sum is 61.

The spelling of 266774606845 in words is "two hundred sixty-six billion, seven hundred seventy-four million, six hundred six thousand, eight hundred forty-five".