13650775665 has 16 divisors (see below), whose sum is σ = 22253341248. Its totient is φ = 7143046976.

The previous prime is 13650775639. The next prime is 13650775667. The reversal of 13650775665 is 56657705631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13650775665 - 2⁶ = 13650775601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13650775667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8584599 + ... + 8586188.

It is an arithmetic number, because the mean of its divisors is an integer number (1390833828).

Almost surely, 2^13650775665 is an apocalyptic number.

13650775665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13650775665 is a deficient number, since it is larger than the sum of its proper divisors (8602565583).

13650775665 is a wasteful number, since it uses less digits than its factorization.

13650775665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17170848.

The product of its (nonzero) digits is 3969000, while the sum is 51.

The spelling of 13650775665 in words is "thirteen billion, six hundred fifty million, seven hundred seventy-five thousand, six hundred sixty-five".