266512403340 has 72 divisors (see below), whose sum is σ = 809702476128. Its totient is φ = 70957313280.

The previous prime is 266512403293. The next prime is 266512403341. The reversal of 266512403340 is 43304215662.

266512403340 is a `hidden beast` number, since 2 + 66 + 512 + 40 + 3 + 3 + 40 = 666.

266512403340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266512403340² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 266512403295 and 266512403304.

It is not an unprimeable number, because it can be changed into a prime (266512403341) 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 23 ways as a sum of consecutive naturals, for example, 1059657 + ... + 1286816.

It is an arithmetic number, because the mean of its divisors is an integer number (11245867724).

Almost surely, 2^266512403340 is an apocalyptic number.

266512403340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266512403340 is an abundant number, since it is smaller than the sum of its proper divisors (543190072788).

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

266512403340 is a wasteful number, since it uses less digits than its factorization.

266512403340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347119 (or 2347114 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 266512403340 in words is "two hundred sixty-six billion, five hundred twelve million, four hundred three thousand, three hundred forty".