266115365025660 has 120 divisors (see below), whose sum is σ = 834819087009600. Its totient is φ = 70963644191616.

The previous prime is 266115365025641. The next prime is 266115365025707. The reversal of 266115365025660 is 66520563511662.

266115365025660 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 1 + 536 + 50 + 2 + 56 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 266115365025597 and 266115365025606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 309961702 + ... + 310819058.

It is an arithmetic number, because the mean of its divisors is an integer number (6956825725080).

Almost surely, 2^{266115365025660} is an apocalyptic number.

266115365025660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266115365025660 is an abundant number, since it is smaller than the sum of its proper divisors (568703721983940).

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

266115365025660 is a wasteful number, since it uses less digits than its factorization.

266115365025660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048977 (or 1048966 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 266115365025660 in words is "two hundred sixty-six trillion, one hundred fifteen billion, three hundred sixty-five million, twenty-five thousand, six hundred sixty".