266238543320 has 32 divisors (see below), whose sum is σ = 625081799520. Its totient is φ = 101865181440.

The previous prime is 266238543293. The next prime is 266238543349. The reversal of 266238543320 is 23345832662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144693941 + ... + 144695780.

It is an arithmetic number, because the mean of its divisors is an integer number (19533806235).

Almost surely, 2^266238543320 is an apocalyptic number.

266238543320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266238543320 is an abundant number, since it is smaller than the sum of its proper divisors (358843256200).

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

266238543320 is a wasteful number, since it uses less digits than its factorization.

266238543320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289389755 (or 289389751 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 266238543320 in words is "two hundred sixty-six billion, two hundred thirty-eight million, five hundred forty-three thousand, three hundred twenty".