1663538606 has 8 divisors (see below), whose sum is σ = 2495981280. Its totient is φ = 831544848.

The previous prime is 1663538593. The next prime is 1663538623. The reversal of 1663538606 is 6068353661.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102806 + ... + 117881.

It is an arithmetic number, because the mean of its divisors is an integer number (311997660).

Almost surely, 2^1663538606 is an apocalyptic number.

1663538606 is a deficient number, since it is larger than the sum of its proper divisors (832442674).

1663538606 is a wasteful number, since it uses less digits than its factorization.

1663538606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224458.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 1663538606 is about 40786.5002911503. The cubic root of 1663538606 is about 1184.8888917647. Note that the first 4 decimals are identical.

The spelling of 1663538606 in words is "one billion, six hundred sixty-three million, five hundred thirty-eight thousand, six hundred six".