266442040000 has 140 divisors (see below), whose sum is σ = 667241264448. Its totient is φ = 105520000000.

The previous prime is 266442039991. The next prime is 266442040001. The reversal of 266442040000 is 40244662.

It is not an unprimeable number, because it can be changed into a prime (266442040001) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 4007025 + ... + 4072975.

Almost surely, 2^266442040000 is an apocalyptic number.

266442040000 is a gapful number since it is divisible by the number (20) 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 266442040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333620632224).

266442040000 is an abundant number, since it is smaller than the sum of its proper divisors (400799224448).

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

266442040000 is an equidigital number, since it uses as much as digits as its factorization.

266442040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66084 (or 66059 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 266442040000 its reverse (40244662), we get a palindrome (266482284662).

The spelling of 266442040000 in words is "two hundred sixty-six billion, four hundred forty-two million, forty thousand".