266712205760 has 672 divisors, whose sum is σ = 919148223168. Its totient is φ = 72212152320.

The previous prime is 266712205723. The next prime is 266712205769. The reversal of 266712205760 is 67502217662.

It is a super-2 number, since 2×266712205760² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266712205769) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38114582 + ... + 38121578.

It is an arithmetic number, because the mean of its divisors is an integer number (1367780094).

Almost surely, 2^266712205760 is an apocalyptic number.

266712205760 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 266712205760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459574111584).

266712205760 is an abundant number, since it is smaller than the sum of its proper divisors (652436017408).

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

266712205760 is a wasteful number, since it uses less digits than its factorization.

266712205760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7069 (or 7052 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 266712205760 in words is "two hundred sixty-six billion, seven hundred twelve million, two hundred five thousand, seven hundred sixty".