266479922791 has 4 divisors (see below), whose sum is σ = 266627069784. Its totient is φ = 266332775800.

The previous prime is 266479922789. The next prime is 266479922831. The reversal of 266479922791 is 197229974662.

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

It is a cyclic number.

It is not a de Polignac number, because 266479922791 - 2¹ = 266479922789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266479929791) 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, 73570780 + ... + 73574401.

It is an arithmetic number, because the mean of its divisors is an integer number (66656767446).

Almost surely, 2^266479922791 is an apocalyptic number.

266479922791 is a deficient number, since it is larger than the sum of its proper divisors (147146993).

266479922791 is a wasteful number, since it uses less digits than its factorization.

266479922791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147146992.

The product of its digits is 41150592, while the sum is 64.

The spelling of 266479922791 in words is "two hundred sixty-six billion, four hundred seventy-nine million, nine hundred twenty-two thousand, seven hundred ninety-one".