1366653644 has 6 divisors (see below), whose sum is σ = 2391643884. Its totient is φ = 683326820.

The previous prime is 1366653643. The next prime is 1366653667. The reversal of 1366653644 is 4463566631.

It is a junction number, because it is equal to n+sod(n) for n = 1366653595 and 1366653604.

It is not an unprimeable number, because it can be changed into a prime (1366653643) by changing a digit.

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 as a sum of consecutive naturals, namely, 170831702 + ... + 170831709.

It is an arithmetic number, because the mean of its divisors is an integer number (398607314).

Almost surely, 2^1366653644 is an apocalyptic number.

It is an amenable number.

1366653644 is a deficient number, since it is larger than the sum of its proper divisors (1024990240).

1366653644 is a wasteful number, since it uses less digits than its factorization.

1366653644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341663415 (or 341663413 counting only the distinct ones).

The product of its digits is 933120, while the sum is 44.

The square root of 1366653644 is about 36968.2788887987. The cubic root of 1366653644 is about 1109.7355223034.

The spelling of 1366653644 in words is "one billion, three hundred sixty-six million, six hundred fifty-three thousand, six hundred forty-four".