1366341655680 has 768 divisors, whose sum is σ = 5204064153600. Its totient is φ = 329005670400.

The previous prime is 1366341655619. The next prime is 1366341655727. The reversal of 1366341655680 is 865561436631.

1366341655680 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 3 + 4 + 1 + 6 + 556 + 80 = 666.

It is a super-3 number, since 3×1366341655680³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 227303875 + ... + 227309885.

It is an arithmetic number, because the mean of its divisors is an integer number (6776125200).

Almost surely, 2^{1366341655680} is an apocalyptic number.

1366341655680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366341655680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2602032076800).

1366341655680 is an abundant number, since it is smaller than the sum of its proper divisors (3837722497920).

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

1366341655680 is a wasteful number, since it uses less digits than its factorization.

1366341655680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153 (or 6138 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 1366341655680 in words is "one trillion, three hundred sixty-six billion, three hundred forty-one million, six hundred fifty-five thousand, six hundred eighty".