13650665 has 12 divisors (see below), whose sum is σ = 19055556. Its totient is φ = 9360288.

The previous prime is 13650631. The next prime is 13650667. The reversal of 13650665 is 56605631.

It can be written as a sum of positive squares in 2 ways, for example, as 9357481 + 4293184 = 3059^2 + 2072^2 .

It is not a de Polignac number, because 13650665 - 2⁸ = 13650409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13650667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27614 + ... + 28103.

It is an arithmetic number, because the mean of its divisors is an integer number (1587963).

Almost surely, 2^13650665 is an apocalyptic number.

It is an amenable number.

13650665 is a deficient number, since it is larger than the sum of its proper divisors (5404891).

13650665 is an equidigital number, since it uses as much as digits as its factorization.

13650665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55736 (or 55729 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 13650665 is about 3694.6806357248. The cubic root of 13650665 is about 238.9926819769.

The spelling of 13650665 in words is "thirteen million, six hundred fifty thousand, six hundred sixty-five".