1663271063 has 4 divisors (see below), whose sum is σ = 1686697488. Its totient is φ = 1639844640.

The previous prime is 1663271009. The next prime is 1663271087. The reversal of 1663271063 is 3601723661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663271063 - 2¹⁰ = 1663270039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663211063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11713106 + ... + 11713247.

It is an arithmetic number, because the mean of its divisors is an integer number (421674372).

Almost surely, 2^1663271063 is an apocalyptic number.

1663271063 is a deficient number, since it is larger than the sum of its proper divisors (23426425).

1663271063 is an equidigital number, since it uses as much as digits as its factorization.

1663271063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23426424.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 1663271063 is about 40783.2203608298. The cubic root of 1663271063 is about 1184.8253673949.

The spelling of 1663271063 in words is "one billion, six hundred sixty-three million, two hundred seventy-one thousand, sixty-three".