266412022500 has 180 divisors, whose sum is σ = 841139586672. Its totient is φ = 65578032000.

The previous prime is 266412022493. The next prime is 266412022501. The reversal of 266412022500 is 5220214662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (266412022501) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1162407 + ... + 1372593.

Almost surely, 2^266412022500 is an apocalyptic number.

266412022500 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 266412022500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420569793336).

266412022500 is an abundant number, since it is smaller than the sum of its proper divisors (574727564172).

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

266412022500 is a wasteful number, since it uses less digits than its factorization.

266412022500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210240 (or 210210 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 266412022500 in words is "two hundred sixty-six billion, four hundred twelve million, twenty-two thousand, five hundred".