266368686869 has 4 divisors (see below), whose sum is σ = 266398527660. Its totient is φ = 266338846080.

The previous prime is 266368686827. The next prime is 266368686907. The reversal of 266368686869 is 968686863662.

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 44843144644 + 221525542225 = 211762^2 + 470665^2 .

It is a cyclic number.

It is not a de Polignac number, because 266368686869 - 2¹² = 266368682773 is a prime.

It is a super-2 number, since 2×266368686869² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266368686796 and 266368686805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266368686569) 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, 14907002 + ... + 14924859.

It is an arithmetic number, because the mean of its divisors is an integer number (66599631915).

Almost surely, 2^266368686869 is an apocalyptic number.

It is an amenable number.

266368686869 is a deficient number, since it is larger than the sum of its proper divisors (29840791).

266368686869 is an equidigital number, since it uses as much as digits as its factorization.

266368686869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29840790.

The product of its digits is 1289945088, while the sum is 74.

The spelling of 266368686869 in words is "two hundred sixty-six billion, three hundred sixty-eight million, six hundred eighty-six thousand, eight hundred sixty-nine".