26665266807234 has 128 divisors (see below), whose sum is σ = 66394714901760. Its totient is φ = 7861458240000.

The previous prime is 26665266807203. The next prime is 26665266807239. The reversal of 26665266807234 is 43270866256662.

It is a super-2 number, since 2×26665266807234² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26665266807239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 417572052 + ... + 417635904.

It is an arithmetic number, because the mean of its divisors is an integer number (518708710170).

Almost surely, 2^{26665266807234} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26665266807234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33197357450880).

26665266807234 is an abundant number, since it is smaller than the sum of its proper divisors (39729448094526).

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

26665266807234 is a wasteful number, since it uses less digits than its factorization.

26665266807234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82913 (or 82907 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 63.

The spelling of 26665266807234 in words is "twenty-six trillion, six hundred sixty-five billion, two hundred sixty-six million, eight hundred seven thousand, two hundred thirty-four".