266640659296 has 96 divisors (see below), whose sum is σ = 581607280800. Its totient is φ = 119320903680.

The previous prime is 266640659281. The next prime is 266640659371. The reversal of 266640659296 is 692956046662.

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 15 ways as a sum of consecutive naturals, for example, 7281160 + ... + 7317688.

It is an arithmetic number, because the mean of its divisors is an integer number (6058409175).

Almost surely, 2^266640659296 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 266640659296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290803640400).

266640659296 is an abundant number, since it is smaller than the sum of its proper divisors (314966621504).

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

266640659296 is a wasteful number, since it uses less digits than its factorization.

266640659296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36872 (or 36864 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 266640659296 in words is "two hundred sixty-six billion, six hundred forty million, six hundred fifty-nine thousand, two hundred ninety-six".