266347016208 has 1440 divisors, whose sum is σ = 1031714716032. Its totient is φ = 65840947200.

The previous prime is 266347016207. The next prime is 266347016227. The reversal of 266347016208 is 802610743662.

266347016208 is a `hidden beast` number, since 2 + 6 + 634 + 7 + 0 + 1 + 6 + 2 + 0 + 8 = 666.

It is a super-2 number, since 2×266347016208² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266347016207) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 4366344498 + ... + 4366344558.

Almost surely, 2^266347016208 is an apocalyptic number.

266347016208 is a gapful number since it is divisible by the number (28) 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 266347016208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515857358016).

266347016208 is an abundant number, since it is smaller than the sum of its proper divisors (765367699824).

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

266347016208 is a wasteful number, since it uses less digits than its factorization.

266347016208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 266347016208 in words is "two hundred sixty-six billion, three hundred forty-seven million, sixteen thousand, two hundred eight".