18663065 has 8 divisors (see below), whose sum is σ = 22437960. Its totient is φ = 14902272.

The previous prime is 18663019. The next prime is 18663103. The reversal of 18663065 is 56036681.

It can be written as a sum of positive squares in 4 ways, for example, as 2758921 + 15904144 = 1661^2 + 3988^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18663065 - 2¹⁰ = 18662041 is a prime.

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, 350 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (2804745).

Almost surely, 2^18663065 is an apocalyptic number.

It is an amenable number.

18663065 is a deficient number, since it is larger than the sum of its proper divisors (3774895).

18663065 is an equidigital number, since it uses as much as digits as its factorization.

18663065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 18663065 is about 4320.0769669070. The cubic root of 18663065 is about 265.2534184317.

The spelling of 18663065 in words is "eighteen million, six hundred sixty-three thousand, sixty-five".