1366365663 has 24 divisors (see below), whose sum is σ = 2128093968. Its totient is φ = 839797632.

The previous prime is 1366365661. The next prime is 1366365731. The reversal of 1366365663 is 3665636631.

1366365663 is a `hidden beast` number, since 1 + 3 + 6 + 636 + 5 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 1366365663 - 2¹ = 1366365661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366365661) 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 in 23 ways as a sum of consecutive naturals, for example, 93456 + ... + 107082.

It is an arithmetic number, because the mean of its divisors is an integer number (88670582).

Almost surely, 2^1366365663 is an apocalyptic number.

1366365663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1366365663 is a deficient number, since it is larger than the sum of its proper divisors (761728305).

1366365663 is a wasteful number, since it uses less digits than its factorization.

1366365663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14503 (or 14500 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 45.

The square root of 1366365663 is about 36964.3837091869. The cubic root of 1366365663 is about 1109.6575690739.

The spelling of 1366365663 in words is "one billion, three hundred sixty-six million, three hundred sixty-five thousand, six hundred sixty-three".