663606065 has 8 divisors (see below), whose sum is σ = 838239360. Its totient is φ = 502943472.

The previous prime is 663606059. The next prime is 663606079. The reversal of 663606065 is 560606366.

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 663606065 - 2¹⁴ = 663589681 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, 3492569 + ... + 3492758.

It is an arithmetic number, because the mean of its divisors is an integer number (104779920).

Almost surely, 2^663606065 is an apocalyptic number.

It is an amenable number.

663606065 is a deficient number, since it is larger than the sum of its proper divisors (174633295).

663606065 is a wasteful number, since it uses less digits than its factorization.

663606065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985351.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 663606065 is about 25760.5524979570. The cubic root of 663606065 is about 872.2415728206.

The spelling of 663606065 in words is "six hundred sixty-three million, six hundred six thousand, sixty-five".