266526506560020 has 192 divisors, whose sum is σ = 897857059276800. Its totient is φ = 57708638507520.

The previous prime is 266526506560009. The next prime is 266526506560057. The reversal of 266526506560020 is 20065605625662.

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, 84483391 + ... + 87581369.

It is an arithmetic number, because the mean of its divisors is an integer number (4676338850400).

Almost surely, 2^{266526506560020} is an apocalyptic number.

266526506560020 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 266526506560020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448928529638400).

266526506560020 is an abundant number, since it is smaller than the sum of its proper divisors (631330552716780).

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

266526506560020 is a wasteful number, since it uses less digits than its factorization.

266526506560020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108798 (or 3108796 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 266526506560020 in words is "two hundred sixty-six trillion, five hundred twenty-six billion, five hundred six million, five hundred sixty thousand, twenty".