266402423200 has 144 divisors (see below), whose sum is σ = 656570086200. Its totient is φ = 105547345920.

The previous prime is 266402423191. The next prime is 266402423207. The reversal of 266402423200 is 2324204662.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 66689963536 + 199712459664 = 258244^2 + 446892^2 .

It is a super-3 number, since 3×266402423200³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (266402423207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38333326 + ... + 38340274.

Almost surely, 2^266402423200 is an apocalyptic number.

266402423200 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 266402423200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328285043100).

266402423200 is an abundant number, since it is smaller than the sum of its proper divisors (390167663000).

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

266402423200 is a wasteful number, since it uses less digits than its factorization.

266402423200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419 (or 7406 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 266402423200 its reverse (2324204662), we get a palindrome (268726627862).

The spelling of 266402423200 in words is "two hundred sixty-six billion, four hundred two million, four hundred twenty-three thousand, two hundred".