1663109503 has 8 divisors (see below), whose sum is σ = 1819359360. Its totient is φ = 1507702680.

The previous prime is 1663109471. The next prime is 1663109521. The reversal of 1663109503 is 3059013661.

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

It is not a de Polignac number, because 1663109503 - 2⁵ = 1663109471 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 (1663109533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206625 + ... + 214522.

It is an arithmetic number, because the mean of its divisors is an integer number (227419920).

Almost surely, 2^1663109503 is an apocalyptic number.

1663109503 is a deficient number, since it is larger than the sum of its proper divisors (156249857).

1663109503 is a wasteful number, since it uses less digits than its factorization.

1663109503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421517.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 1663109503 is about 40781.2395961673. The cubic root of 1663109503 is about 1184.7870039177.

The spelling of 1663109503 in words is "one billion, six hundred sixty-three million, one hundred nine thousand, five hundred three".