665654063 has 8 divisors (see below), whose sum is σ = 695098368. Its totient is φ = 636251704.

The previous prime is 665654053. The next prime is 665654069. The reversal of 665654063 is 360456566.

It is a happy number.

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 665654063 - 2⁴ = 665654047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665654063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665654069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24470 + ... + 43932.

It is an arithmetic number, because the mean of its divisors is an integer number (86887296).

Almost surely, 2^665654063 is an apocalyptic number.

665654063 is a deficient number, since it is larger than the sum of its proper divisors (29444305).

665654063 is a wasteful number, since it uses less digits than its factorization.

665654063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20973.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 665654063 is about 25800.2725373202. The cubic root of 665654063 is about 873.1379452213.

The spelling of 665654063 in words is "six hundred sixty-five million, six hundred fifty-four thousand, sixty-three".