14665561 has 4 divisors (see below), whose sum is σ = 15171300. Its totient is φ = 14159824.

The previous prime is 14665531. The next prime is 14665583. The reversal of 14665561 is 16556641.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 10017225 = 2156^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 14665561 - 2⁷ = 14665433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14665531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252826 + ... + 252883.

It is an arithmetic number, because the mean of its divisors is an integer number (3792825).

Almost surely, 2^14665561 is an apocalyptic number.

It is an amenable number.

14665561 is a deficient number, since it is larger than the sum of its proper divisors (505739).

14665561 is an equidigital number, since it uses as much as digits as its factorization.

14665561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505738.

The product of its digits is 21600, while the sum is 34.

The square root of 14665561 is about 3829.5640744085. The cubic root of 14665561 is about 244.7745308719.

The spelling of 14665561 in words is "fourteen million, six hundred sixty-five thousand, five hundred sixty-one".