266266685568 has 512 divisors, whose sum is σ = 817263820800. Its totient is φ = 76186091520.

The previous prime is 266266685549. The next prime is 266266685627. The reversal of 266266685568 is 865586662662.

It is a junction number, because it is equal to n+sod(n) for n = 266266685499 and 266266685508.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 725522121 + ... + 725522487.

It is an arithmetic number, because the mean of its divisors is an integer number (1596218400).

Almost surely, 2^266266685568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266266685568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408631910400).

266266685568 is an abundant number, since it is smaller than the sum of its proper divisors (550997135232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266266685568 is a wasteful number, since it uses less digits than its factorization.

266266685568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 568 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 66.

The spelling of 266266685568 in words is "two hundred sixty-six billion, two hundred sixty-six million, six hundred eighty-five thousand, five hundred sixty-eight".