266538261050208 has 384 divisors, whose sum is σ = 891226338508800. Its totient is φ = 75916940069376.

The previous prime is 266538261050197. The next prime is 266538261050231. The reversal of 266538261050208 is 802050162835662.

266538261050208 is a `hidden beast` number, since 2 + 6 + 6 + 5 + 382 + 6 + 1 + 0 + 50 + 208 = 666.

266538261050208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5049672585 + ... + 5049725367.

It is an arithmetic number, because the mean of its divisors is an integer number (2320901923200).

Almost surely, 2^{266538261050208} is an apocalyptic number.

266538261050208 is a gapful number since it is divisible by the number (28) 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 266538261050208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445613169254400).

266538261050208 is an abundant number, since it is smaller than the sum of its proper divisors (624688077458592).

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

266538261050208 is a wasteful number, since it uses less digits than its factorization.

266538261050208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55391 (or 55377 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 266538261050208 in words is "two hundred sixty-six trillion, five hundred thirty-eight billion, two hundred sixty-one million, fifty thousand, two hundred eight".