1366216365 has 8 divisors (see below), whose sum is σ = 2185946208. Its totient is φ = 728648720.

The previous prime is 1366216333. The next prime is 1366216387. The reversal of 1366216365 is 5636126631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1366216365 - 2⁵ = 1366216333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45540531 + ... + 45540560.

It is an arithmetic number, because the mean of its divisors is an integer number (273243276).

Almost surely, 2^1366216365 is an apocalyptic number.

1366216365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1366216365 is a deficient number, since it is larger than the sum of its proper divisors (819729843).

1366216365 is an equidigital number, since it uses as much as digits as its factorization.

1366216365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91081099.

The product of its digits is 116640, while the sum is 39.

The square root of 1366216365 is about 36962.3641695171. The cubic root of 1366216365 is about 1109.6171514672.

The spelling of 1366216365 in words is "one billion, three hundred sixty-six million, two hundred sixteen thousand, three hundred sixty-five".