266111440452 has 192 divisors, whose sum is σ = 815337734400. Its totient is φ = 74436036480.

The previous prime is 266111440409. The next prime is 266111440457. The reversal of 266111440452 is 254044111662.

266111440452 is a `hidden beast` number, since 2 + 6 + 61 + 1 + 144 + 0 + 452 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (266111440457) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2559058 + ... + 2661014.

It is an arithmetic number, because the mean of its divisors is an integer number (4246550700).

Almost surely, 2^266111440452 is an apocalyptic number.

266111440452 is a gapful number since it is divisible by the number (22) 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 266111440452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407668867200).

266111440452 is an abundant number, since it is smaller than the sum of its proper divisors (549226293948).

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

266111440452 is a wasteful number, since it uses less digits than its factorization.

266111440452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102020 (or 101986 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 266111440452 in words is "two hundred sixty-six billion, one hundred eleven million, four hundred forty thousand, four hundred fifty-two".