266618898816 has 256 divisors, whose sum is σ = 733300162560. Its totient is φ = 85785993216.

The previous prime is 266618898781. The next prime is 266618898839. The reversal of 266618898816 is 618898816662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 671583930 + ... + 671584326.

It is an arithmetic number, because the mean of its divisors is an integer number (2864453760).

Almost surely, 2^266618898816 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 266618898816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366650081280).

266618898816 is an abundant number, since it is smaller than the sum of its proper divisors (466681263744).

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

266618898816 is a wasteful number, since it uses less digits than its factorization.

266618898816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 869 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 69.

The spelling of 266618898816 in words is "two hundred sixty-six billion, six hundred eighteen million, eight hundred ninety-eight thousand, eight hundred sixteen".