1366531056 has 120 divisors (see below), whose sum is σ = 4269298176. Its totient is φ = 404449920.

The previous prime is 1366531031. The next prime is 1366531079. The reversal of 1366531056 is 6501356631.

1366531056 is a `hidden beast` number, since 13 + 66 + 531 + 0 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1366531056.

It is a congruent number.

It is an unprimeable number.

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, 58081 + ... + 78143.

Almost surely, 2^1366531056 is an apocalyptic number.

1366531056 is a gapful number since it is divisible by the number (16) 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 1366531056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134649088).

1366531056 is an abundant number, since it is smaller than the sum of its proper divisors (2902767120).

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

1366531056 is a wasteful number, since it uses less digits than its factorization.

1366531056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131 (or 20122 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1366531056 is about 36966.6208355592. The cubic root of 1366531056 is about 1109.7023404443.

Adding to 1366531056 its reverse (6501356631), we get a palindrome (7867887687).

The spelling of 1366531056 in words is "one billion, three hundred sixty-six million, five hundred thirty-one thousand, fifty-six".