266507272237356 has 144 divisors (see below), whose sum is σ = 711326700564480. Its totient is φ = 83963374767360.

The previous prime is 266507272237337. The next prime is 266507272237391. The reversal of 266507272237356 is 653732272705662.

266507272237356 is a `hidden beast` number, since 2 + 6 + 6 + 5 + 0 + 7 + 272 + 2 + 3 + 7 + 356 = 666.

It is a super-2 number, since 2×266507272237356² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266507272237293 and 266507272237302.

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 47 ways as a sum of consecutive naturals, for example, 111045621 + ... + 113420211.

It is an arithmetic number, because the mean of its divisors is an integer number (4939768753920).

Almost surely, 2^{266507272237356} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266507272237356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355663350282240).

266507272237356 is an abundant number, since it is smaller than the sum of its proper divisors (444819428327124).

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

266507272237356 is a wasteful number, since it uses less digits than its factorization.

266507272237356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376236 (or 2376231 counting only the distinct ones).

The product of its (nonzero) digits is 266716800, while the sum is 63.

The spelling of 266507272237356 in words is "two hundred sixty-six trillion, five hundred seven billion, two hundred seventy-two million, two hundred thirty-seven thousand, three hundred fifty-six".