1366996644 has 72 divisors (see below), whose sum is σ = 3726128952. Its totient is φ = 420065280.

The previous prime is 1366996643. The next prime is 1366996661. The reversal of 1366996644 is 4466996631.

It can be written as a sum of positive squares in 4 ways, for example, as 357663744 + 1009332900 = 18912^2 + 31770^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1366996643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495172 + ... + 497924.

It is an arithmetic number, because the mean of its divisors is an integer number (51751791).

Almost surely, 2^1366996644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366996644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1863064476).

1366996644 is an abundant number, since it is smaller than the sum of its proper divisors (2359132308).

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

1366996644 is a wasteful number, since it uses less digits than its factorization.

1366996644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3832 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 1366996644 is about 36972.9177101294. The cubic root of 1366996644 is about 1109.8283542720.

The spelling of 1366996644 in words is "one billion, three hundred sixty-six million, nine hundred ninety-six thousand, six hundred forty-four".