663163505 has 8 divisors (see below), whose sum is σ = 799569024. Its totient is φ = 528015600.

The previous prime is 663163493. The next prime is 663163511. The reversal of 663163505 is 505361366.

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

It is a de Polignac number, because none of the positive numbers 2^k-663163505 is a prime.

It is a Duffinian number.

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, 313241 + ... + 315350.

It is an arithmetic number, because the mean of its divisors is an integer number (99946128).

Almost surely, 2^663163505 is an apocalyptic number.

It is an amenable number.

663163505 is a deficient number, since it is larger than the sum of its proper divisors (136405519).

663163505 is a wasteful number, since it uses less digits than its factorization.

663163505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628807.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 663163505 is about 25751.9611874513. The cubic root of 663163505 is about 872.0476299103.

The spelling of 663163505 in words is "six hundred sixty-three million, one hundred sixty-three thousand, five hundred five".