266645280384 has 768 divisors, whose sum is σ = 931170240000. Its totient is φ = 73156608000.

The previous prime is 266645280373. The next prime is 266645280439. The reversal of 266645280384 is 483082546662.

It is a happy number.

266645280384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 266645280384.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1765862709 + ... + 1765862859.

It is an arithmetic number, because the mean of its divisors is an integer number (1212461250).

Almost surely, 2^266645280384 is an apocalyptic number.

266645280384 is a gapful number since it is divisible by the number (24) 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 266645280384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465585120000).

266645280384 is an abundant number, since it is smaller than the sum of its proper divisors (664524959616).

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

266645280384 is a wasteful number, since it uses less digits than its factorization.

266645280384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 266645280384 in words is "two hundred sixty-six billion, six hundred forty-five million, two hundred eighty thousand, three hundred eighty-four".