266640377360 has 80 divisors (see below), whose sum is σ = 750178164096. Its totient is φ = 86041933824.

The previous prime is 266640377323. The next prime is 266640377363. The reversal of 266640377360 is 63773046662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 266640377299 and 266640377308.

It is not an unprimeable number, because it can be changed into a prime (266640377363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13994702 + ... + 14013741.

Almost surely, 2^266640377360 is an apocalyptic number.

266640377360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266640377360 is an abundant number, since it is smaller than the sum of its proper divisors (483537786736).

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

266640377360 is a wasteful number, since it uses less digits than its factorization.

266640377360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28008480 (or 28008474 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 50.

The spelling of 266640377360 in words is "two hundred sixty-six billion, six hundred forty million, three hundred seventy-seven thousand, three hundred sixty".