266812895250 has 288 divisors, whose sum is σ = 796043993472. Its totient is φ = 64434744000.

The previous prime is 266812895233. The next prime is 266812895287. The reversal of 266812895250 is 52598218662.

266812895250 is a `hidden beast` number, since 26 + 6 + 8 + 12 + 89 + 525 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 77045019 + ... + 77048481.

It is an arithmetic number, because the mean of its divisors is an integer number (2764041644).

Almost surely, 2^266812895250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266812895250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398021996736).

266812895250 is an abundant number, since it is smaller than the sum of its proper divisors (529231098222).

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

266812895250 is a wasteful number, since it uses less digits than its factorization.

266812895250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791 (or 3767 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 266812895250 in words is "two hundred sixty-six billion, eight hundred twelve million, eight hundred ninety-five thousand, two hundred fifty".