266147267066880 has 352 divisors, whose sum is σ = 865249328683008. Its totient is φ = 69810516787200.

The previous prime is 266147267066801. The next prime is 266147267066881. The reversal of 266147267066880 is 88660762741662.

266147267066880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266147267066881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469748244 + ... + 470314476.

Almost surely, 2^{266147267066880} is an apocalyptic number.

266147267066880 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 266147267066880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432624664341504).

266147267066880 is an abundant number, since it is smaller than the sum of its proper divisors (599102061616128).

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

266147267066880 is a wasteful number, since it uses less digits than its factorization.

266147267066880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566763 (or 566745 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 69.

The spelling of 266147267066880 in words is "two hundred sixty-six trillion, one hundred forty-seven billion, two hundred sixty-seven million, sixty-six thousand, eight hundred eighty".