1663687016 has 8 divisors (see below), whose sum is σ = 3119413170. Its totient is φ = 831843504.

The previous prime is 1663686979. The next prime is 1663687027. The reversal of 1663687016 is 6107863661.

It can be written as a sum of positive squares in only one way, i.e., 1264086916 + 399600100 = 35554^2 + 19990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103980431 + ... + 103980446.

Almost surely, 2^1663687016 is an apocalyptic number.

It is an amenable number.

1663687016 is a deficient number, since it is larger than the sum of its proper divisors (1455726154).

1663687016 is a wasteful number, since it uses less digits than its factorization.

1663687016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207960883 (or 207960879 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1663687016 is about 40788.3196025529. The cubic root of 1663687016 is about 1184.9241267212.

The spelling of 1663687016 in words is "one billion, six hundred sixty-three million, six hundred eighty-seven thousand, sixteen".