266828242640 has 40 divisors (see below), whose sum is σ = 620447931648. Its totient is φ = 106718864000.

The previous prime is 266828242631. The next prime is 266828242697. The reversal of 266828242640 is 46242828662.

266828242640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×266828242640² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 512765 + ... + 892515.

Almost surely, 2^266828242640 is an apocalyptic number.

266828242640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266828242640 is an abundant number, since it is smaller than the sum of its proper divisors (353619689008).

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

266828242640 is a wasteful number, since it uses less digits than its factorization.

266828242640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388547 (or 388541 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 266828242640 in words is "two hundred sixty-six billion, eight hundred twenty-eight million, two hundred forty-two thousand, six hundred forty".