266444388168 has 192 divisors, whose sum is σ = 842624415360. Its totient is φ = 68533352448.

The previous prime is 266444388157. The next prime is 266444388187. The reversal of 266444388168 is 861883444662.

It is a happy number.

It is a super-2 number, since 2×266444388168² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1422646 + ... + 1599002.

It is an arithmetic number, because the mean of its divisors is an integer number (4388668830).

Almost surely, 2^266444388168 is an apocalyptic number.

266444388168 is a gapful number since it is divisible by the number (28) 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 266444388168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421312207680).

266444388168 is an abundant number, since it is smaller than the sum of its proper divisors (576180027192).

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

266444388168 is a wasteful number, since it uses less digits than its factorization.

266444388168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176436 (or 176409 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 60.

The spelling of 266444388168 in words is "two hundred sixty-six billion, four hundred forty-four million, three hundred eighty-eight thousand, one hundred sixty-eight".