266963740538880 has 2304 divisors, whose sum is σ = 1088731813478400. Its totient is φ = 54661290393600.

The previous prime is 266963740538813. The next prime is 266963740538927. The reversal of 266963740538880 is 88835047369662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 806536980315 + ... + 806536980645.

It is an arithmetic number, because the mean of its divisors is an integer number (472539849600).

Almost surely, 2^{266963740538880} is an apocalyptic number.

266963740538880 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 266963740538880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544365906739200).

266963740538880 is an abundant number, since it is smaller than the sum of its proper divisors (821768072939520).

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

266963740538880 is a wasteful number, since it uses less digits than its factorization.

266963740538880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 2508226560, while the sum is 75.

The spelling of 266963740538880 in words is "two hundred sixty-six trillion, nine hundred sixty-three billion, seven hundred forty million, five hundred thirty-eight thousand, eight hundred eighty".