266502803840 has 1024 divisors, whose sum is σ = 904122777600. Its totient is φ = 72619130880.

The previous prime is 266502803639. The next prime is 266502803873. The reversal of 266502803840 is 48308205662.

It is a junction number, because it is equal to n+sod(n) for n = 266502803791 and 266502803800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 583156892 + ... + 583157348.

It is an arithmetic number, because the mean of its divisors is an integer number (882932400).

Almost surely, 2^266502803840 is an apocalyptic number.

266502803840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266502803840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452061388800).

266502803840 is an abundant number, since it is smaller than the sum of its proper divisors (637619973760).

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

266502803840 is a wasteful number, since it uses less digits than its factorization.

266502803840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 266502803840 in words is "two hundred sixty-six billion, five hundred two million, eight hundred three thousand, eight hundred forty".