1366657344 has 168 divisors, whose sum is σ = 4242343560. Its totient is φ = 418148352.

The previous prime is 1366657307. The next prime is 1366657349. The reversal of 1366657344 is 4437566631.

It can be written as a sum of positive squares in 4 ways, for example, as 258566400 + 1108090944 = 16080^2 + 33288^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1366657344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366657349) 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, 1714354 + ... + 1715150.

It is an arithmetic number, because the mean of its divisors is an integer number (25252045).

Almost surely, 2^1366657344 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 1366657344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121171780).

1366657344 is an abundant number, since it is smaller than the sum of its proper divisors (2875686216).

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

1366657344 is a wasteful number, since it uses less digits than its factorization.

1366657344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1044 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 1366657344 is about 36968.3289316680. The cubic root of 1366657344 is about 1109.7365237807.

The spelling of 1366657344 in words is "one billion, three hundred sixty-six million, six hundred fifty-seven thousand, three hundred forty-four".