1266887168 has 80 divisors (see below), whose sum is σ = 2751133440. Its totient is φ = 580608000.

The previous prime is 1266887161. The next prime is 1266887179. The reversal of 1266887168 is 8617886621.

It is not an unprimeable number, because it can be changed into a prime (1266887161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299468 + ... + 303668.

It is an arithmetic number, because the mean of its divisors is an integer number (34389168).

Almost surely, 2^1266887168 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 1266887168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375566720).

1266887168 is an abundant number, since it is smaller than the sum of its proper divisors (1484246272).

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

1266887168 is an equidigital number, since it uses as much as digits as its factorization.

1266887168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269 (or 4253 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 53.

The square root of 1266887168 is about 35593.3584816044. The cubic root of 1266887168 is about 1082.0466357969.

The spelling of 1266887168 in words is "one billion, two hundred sixty-six million, eight hundred eighty-seven thousand, one hundred sixty-eight".