266779548672 has 352 divisors, whose sum is σ = 887548806144. Its totient is φ = 69363302400.

The previous prime is 266779548667. The next prime is 266779548713. The reversal of 266779548672 is 276845977662.

It is a super-4 number, since 4×266779548672⁴ (a number of 47 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266779548597 and 266779548606.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 19841472 + ... + 19854912.

It is an arithmetic number, because the mean of its divisors is an integer number (2521445472).

Almost surely, 2^266779548672 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 266779548672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443774403072).

266779548672 is an abundant number, since it is smaller than the sum of its proper divisors (620769257472).

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

266779548672 is a wasteful number, since it uses less digits than its factorization.

266779548672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13555 (or 13537 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 69.

The spelling of 266779548672 in words is "two hundred sixty-six billion, seven hundred seventy-nine million, five hundred forty-eight thousand, six hundred seventy-two".