266278776379 has 24 divisors (see below), whose sum is σ = 350376427008. Its totient is φ = 196569411120.

The previous prime is 266278776367. The next prime is 266278776391. The reversal of 266278776379 is 973677872662.

It is an interprime number because it is at equal distance from previous prime (266278776367) and next prime (266278776391).

It is not a de Polignac number, because 266278776379 - 2¹⁷ = 266278645307 is a prime.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266278776479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4761907 + ... + 4817500.

It is an arithmetic number, because the mean of its divisors is an integer number (14599017792).

Almost surely, 2^266278776379 is an apocalyptic number.

266278776379 is a deficient number, since it is larger than the sum of its proper divisors (84097650629).

266278776379 is a wasteful number, since it uses less digits than its factorization.

266278776379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579463 (or 9579444 counting only the distinct ones).

The product of its digits is 448084224, while the sum is 70.

The spelling of 266278776379 in words is "two hundred sixty-six billion, two hundred seventy-eight million, seven hundred seventy-six thousand, three hundred seventy-nine".