266166069768 has 128 divisors (see below), whose sum is σ = 771706828800. Its totient is φ = 84841339968.

The previous prime is 266166069739. The next prime is 266166069779. The reversal of 266166069768 is 867960661662.

266166069768 is a `hidden beast` number, since 2 + 6 + 6 + 16 + 606 + 9 + 7 + 6 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34985821 + ... + 34993427.

It is an arithmetic number, because the mean of its divisors is an integer number (6028959600).

Almost surely, 2^266166069768 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 266166069768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385853414400).

266166069768 is an abundant number, since it is smaller than the sum of its proper divisors (505540759032).

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

266166069768 is a wasteful number, since it uses less digits than its factorization.

266166069768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14688 (or 14678 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 266166069768 in words is "two hundred sixty-six billion, one hundred sixty-six million, sixty-nine thousand, seven hundred sixty-eight".