266840192088 has 192 divisors, whose sum is σ = 747027852480. Its totient is φ = 85994496000.

The previous prime is 266840192053. The next prime is 266840192089. The reversal of 266840192088 is 880291048662.

266840192088 is a `hidden beast` number, since 26 + 6 + 8 + 401 + 9 + 208 + 8 = 666.

It is a super-2 number, since 2×266840192088² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266840192089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204788445 + ... + 204789747.

It is an arithmetic number, because the mean of its divisors is an integer number (3890770065).

Almost surely, 2^266840192088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266840192088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373513926240).

266840192088 is an abundant number, since it is smaller than the sum of its proper divisors (480187660392).

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

266840192088 is a wasteful number, since it uses less digits than its factorization.

266840192088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 266840192088 in words is "two hundred sixty-six billion, eight hundred forty million, one hundred ninety-two thousand, eighty-eight".