1663663489 has 8 divisors (see below), whose sum is σ = 1675690560. Its totient is φ = 1651650000.

The previous prime is 1663663487. The next prime is 1663663501. The reversal of 1663663489 is 9843663661.

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 1663663489 - 2¹ = 1663663487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663663483) 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, 489207 + ... + 492595.

It is an arithmetic number, because the mean of its divisors is an integer number (209461320).

Almost surely, 2^1663663489 is an apocalyptic number.

It is an amenable number.

1663663489 is a deficient number, since it is larger than the sum of its proper divisors (12027071).

1663663489 is a wasteful number, since it uses less digits than its factorization.

1663663489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791.

The product of its digits is 3359232, while the sum is 52.

The square root of 1663663489 is about 40788.0311978894. The cubic root of 1663663489 is about 1184.9185411671.

The spelling of 1663663489 in words is "one billion, six hundred sixty-three million, six hundred sixty-three thousand, four hundred eighty-nine".