266161660260 has 96 divisors (see below), whose sum is σ = 755225856000. Its totient is φ = 70027900800.

The previous prime is 266161660241. The next prime is 266161660283. The reversal of 266161660260 is 62066161662.

It is a happy number.

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, 6858391 + ... + 6897089.

It is an arithmetic number, because the mean of its divisors is an integer number (7866936000).

Almost surely, 2^266161660260 is an apocalyptic number.

266161660260 is a gapful number since it is divisible by the number (20) 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 266161660260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377612928000).

266161660260 is an abundant number, since it is smaller than the sum of its proper divisors (489064195740).

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

266161660260 is a wasteful number, since it uses less digits than its factorization.

266161660260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40241 (or 40239 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 266161660260 in words is "two hundred sixty-six billion, one hundred sixty-one million, six hundred sixty thousand, two hundred sixty".