13664727 has 8 divisors (see below), whose sum is σ = 20244080. Its totient is φ = 9109800.

The previous prime is 13664723. The next prime is 13664747. The reversal of 13664727 is 72746631.

13664727 is a `hidden beast` number, since 1 + 3 + 6 + 647 + 2 + 7 = 666.

It is not a de Polignac number, because 13664727 - 2² = 13664723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13664691 and 13664700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664723) 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 7 ways as a sum of consecutive naturals, for example, 253024 + ... + 253077.

It is an arithmetic number, because the mean of its divisors is an integer number (2530510).

Almost surely, 2^13664727 is an apocalyptic number.

13664727 is a deficient number, since it is larger than the sum of its proper divisors (6579353).

13664727 is an equidigital number, since it uses as much as digits as its factorization.

13664727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506110 (or 506104 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 13664727 is about 3696.5831520473. The cubic root of 13664727 is about 239.0747185604.

The spelling of 13664727 in words is "thirteen million, six hundred sixty-four thousand, seven hundred twenty-seven".