1366113320 has 128 divisors (see below), whose sum is σ = 3629767680. Its totient is φ = 456192000.

The previous prime is 1366113289. The next prime is 1366113323. The reversal of 1366113320 is 233116631.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1366113320.

It is not an unprimeable number, because it can be changed into a prime (1366113323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1378025 + ... + 1379015.

It is an arithmetic number, because the mean of its divisors is an integer number (28357560).

Almost surely, 2^1366113320 is an apocalyptic number.

1366113320 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 1366113320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814883840).

1366113320 is an abundant number, since it is smaller than the sum of its proper divisors (2263654360).

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

1366113320 is a wasteful number, since it uses less digits than its factorization.

1366113320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1366113320 is about 36960.9702253607. The cubic root of 1366113320 is about 1109.5892536473.

Adding to 1366113320 its reverse (233116631), we get a palindrome (1599229951).

It can be divided in two parts, 136611 and 3320, that added together give a palindrome (139931).

The spelling of 1366113320 in words is "one billion, three hundred sixty-six million, one hundred thirteen thousand, three hundred twenty".