1366545660240 has 80 divisors (see below), whose sum is σ = 4236964763328. Its totient is φ = 364354265088.

The previous prime is 1366545660187. The next prime is 1366545660247. The reversal of 1366545660240 is 420665456631.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1366545660240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366545660247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071619 + ... + 1970141.

Almost surely, 2^{1366545660240} is an apocalyptic number.

1366545660240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366545660240 is an abundant number, since it is smaller than the sum of its proper divisors (2870419103088).

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

1366545660240 is a wasteful number, since it uses less digits than its factorization.

1366545660240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904876 (or 904870 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 1366545660240 in words is "one trillion, three hundred sixty-six billion, five hundred forty-five million, six hundred sixty thousand, two hundred forty".