266896161220 has 96 divisors (see below), whose sum is σ = 635736286080. Its totient is φ = 93304949760.

The previous prime is 266896161143. The next prime is 266896161269. The reversal of 266896161220 is 22161698662.

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, 8931424 + ... + 8961256.

It is an arithmetic number, because the mean of its divisors is an integer number (6622252980).

Almost surely, 2^266896161220 is an apocalyptic number.

266896161220 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 266896161220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317868143040).

266896161220 is an abundant number, since it is smaller than the sum of its proper divisors (368840124860).

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

266896161220 is a wasteful number, since it uses less digits than its factorization.

266896161220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31685 (or 31683 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 266896161220 in words is "two hundred sixty-six billion, eight hundred ninety-six million, one hundred sixty-one thousand, two hundred twenty".