266040066660 has 48 divisors (see below), whose sum is σ = 777299677056. Its totient is φ = 67859494912.

The previous prime is 266040066631. The next prime is 266040066671. The reversal of 266040066660 is 66660040662.

It is a happy number.

266040066660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96389949 + ... + 96392708.

It is an arithmetic number, because the mean of its divisors is an integer number (16193743272).

Almost surely, 2^266040066660 is an apocalyptic number.

266040066660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266040066660 is an abundant number, since it is smaller than the sum of its proper divisors (511259610396).

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

266040066660 is a wasteful number, since it uses less digits than its factorization.

266040066660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192782692 (or 192782690 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The spelling of 266040066660 in words is "two hundred sixty-six billion, forty million, sixty-six thousand, six hundred sixty".