1366403818788 has 60 divisors (see below), whose sum is σ = 3572226460572. Its totient is φ = 455445374400.

The previous prime is 1366403818751. The next prime is 1366403818811. The reversal of 1366403818788 is 8878183046631.

1366403818788 is a `hidden beast` number, since 1 + 3 + 66 + 40 + 381 + 87 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 489498928164 + 876904890624 = 699642^2 + 936432^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7241238 + ... + 7427538.

Almost surely, 2^{1366403818788} is an apocalyptic number.

1366403818788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1366403818788 is an abundant number, since it is smaller than the sum of its proper divisors (2205822641784).

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

1366403818788 is a wasteful number, since it uses less digits than its factorization.

1366403818788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208954 (or 208943 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 1366403818788 in words is "one trillion, three hundred sixty-six billion, four hundred three million, eight hundred eighteen thousand, seven hundred eighty-eight".