266802648216 has 128 divisors (see below), whose sum is σ = 723319027200. Its totient is φ = 81522201600.

The previous prime is 266802648187. The next prime is 266802648221. The reversal of 266802648216 is 612846208662.

It is a happy number.

It is a congruent 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, 75601140 + ... + 75604668.

It is an arithmetic number, because the mean of its divisors is an integer number (5650929900).

Almost surely, 2^266802648216 is an apocalyptic number.

266802648216 is a gapful number since it is divisible by the number (26) 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 266802648216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361659513600).

266802648216 is an abundant number, since it is smaller than the sum of its proper divisors (456516378984).

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

266802648216 is a wasteful number, since it uses less digits than its factorization.

266802648216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 51.

The spelling of 266802648216 in words is "two hundred sixty-six billion, eight hundred two million, six hundred forty-eight thousand, two hundred sixteen".