1663115768 has 16 divisors (see below), whose sum is σ = 3119349480. Its totient is φ = 831289248.

The previous prime is 1663115767. The next prime is 1663115791. The reversal of 1663115768 is 8675113661.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663115761) 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, 5930 + ... + 57977.

Almost surely, 2^1663115768 is an apocalyptic number.

It is an amenable number.

1663115768 is a deficient number, since it is larger than the sum of its proper divisors (1456233712).

1663115768 is a wasteful number, since it uses less digits than its factorization.

1663115768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67166 (or 67162 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 1663115768 is about 40781.3164083750. The cubic root of 1663115768 is about 1184.7884916291.

The spelling of 1663115768 in words is "one billion, six hundred sixty-three million, one hundred fifteen thousand, seven hundred sixty-eight".