266515025332440 has 128 divisors (see below), whose sum is σ = 846582684480000. Its totient is φ = 66889607436288.

The previous prime is 266515025332427. The next prime is 266515025332447. The reversal of 266515025332440 is 44233520515662.

266515025332440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266515025332440² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266515025332440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266515025332447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405425541 + ... + 406082379.

It is an arithmetic number, because the mean of its divisors is an integer number (6613927222500).

Almost surely, 2^{266515025332440} is an apocalyptic number.

266515025332440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266515025332440 is an abundant number, since it is smaller than the sum of its proper divisors (580067659147560).

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

266515025332440 is a wasteful number, since it uses less digits than its factorization.

266515025332440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855769 (or 855765 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 266515025332440 in words is "two hundred sixty-six trillion, five hundred fifteen billion, twenty-five million, three hundred thirty-two thousand, four hundred forty".