266868220688 has 40 divisors (see below), whose sum is σ = 520482227928. Its totient is φ = 132550659072.

The previous prime is 266868220687. The next prime is 266868220699. The reversal of 266868220688 is 886022868662.

It can be written as a sum of positive squares in 4 ways, for example, as 116395604224 + 150472616464 = 341168^2 + 387908^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 266868220688.

It is not an unprimeable number, because it can be changed into a prime (266868220687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12079220 + ... + 12101292.

Almost surely, 2^266868220688 is an apocalyptic number.

It is an amenable number.

266868220688 is a deficient number, since it is larger than the sum of its proper divisors (253614007240).

266868220688 is a wasteful number, since it uses less digits than its factorization.

266868220688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27051 (or 27045 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 62.

The spelling of 266868220688 in words is "two hundred sixty-six billion, eight hundred sixty-eight million, two hundred twenty thousand, six hundred eighty-eight".