266286191040 has 560 divisors, whose sum is σ = 993338615808. Its totient is φ = 67583932416.

The previous prime is 266286190967. The next prime is 266286191051. The reversal of 266286191040 is 40191682662.

266286191040 is a `hidden beast` number, since 2 + 6 + 6 + 28 + 619 + 1 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 132942679 + ... + 132944681.

Almost surely, 2^266286191040 is an apocalyptic number.

266286191040 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 266286191040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496669307904).

266286191040 is an abundant number, since it is smaller than the sum of its proper divisors (727052424768).

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

266286191040 is a wasteful number, since it uses less digits than its factorization.

266286191040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2259 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 266286191040 in words is "two hundred sixty-six billion, two hundred eighty-six million, one hundred ninety-one thousand, forty".