266423040000 has 960 divisors, whose sum is σ = 1063847584800. Its totient is φ = 65470464000.

The previous prime is 266423039989. The next prime is 266423040029. The reversal of 266423040000 is 40324662.

266423040000 is a `hidden beast` number, since 26 + 6 + 4 + 230 + 400 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 449279704 + ... + 449280296.

Almost surely, 2^266423040000 is an apocalyptic number.

266423040000 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 266423040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531923792400).

266423040000 is an abundant number, since it is smaller than the sum of its proper divisors (797424544800).

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

266423040000 is an equidigital number, since it uses as much as digits as its factorization.

266423040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 266423040000 its reverse (40324662), we get a palindrome (266463364662).

The spelling of 266423040000 in words is "two hundred sixty-six billion, four hundred twenty-three million, forty thousand".