1663097568 has 144 divisors (see below), whose sum is σ = 4965060240. Its totient is φ = 486492160.

The previous prime is 1663097563. The next prime is 1663097581. The reversal of 1663097568 is 8657903661.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1663097568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663097563) 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 23 ways as a sum of consecutive naturals, for example, 334396 + ... + 339332.

It is an arithmetic number, because the mean of its divisors is an integer number (34479585).

Almost surely, 2^1663097568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663097568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482530120).

1663097568 is an abundant number, since it is smaller than the sum of its proper divisors (3301962672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663097568 is a wasteful number, since it uses less digits than its factorization.

1663097568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001 (or 4982 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 1663097568 is about 40781.0932663655. The cubic root of 1663097568 is about 1184.7841697754.

The spelling of 1663097568 in words is "one billion, six hundred sixty-three million, ninety-seven thousand, five hundred sixty-eight".