1663502480 has 20 divisors (see below), whose sum is σ = 3867643452. Its totient is φ = 665400960.

The previous prime is 1663502461. The next prime is 1663502483. The reversal of 1663502480 is 842053661.

It can be written as a sum of positive squares in 2 ways, for example, as 912523264 + 750979216 = 30208^2 + 27404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1663502480.

It is not an unprimeable number, because it can be changed into a prime (1663502483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10396811 + ... + 10396970.

Almost surely, 2^1663502480 is an apocalyptic number.

1663502480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663502480 is an abundant number, since it is smaller than the sum of its proper divisors (2204140972).

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

1663502480 is a wasteful number, since it uses less digits than its factorization.

1663502480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20793794 (or 20793788 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1663502480 is about 40786.0574216239. The cubic root of 1663502480 is about 1184.8803145454.

The spelling of 1663502480 in words is "one billion, six hundred sixty-three million, five hundred two thousand, four hundred eighty".