1663478080 has 112 divisors (see below), whose sum is σ = 4364979840. Its totient is φ = 598784000.

The previous prime is 1663478071. The next prime is 1663478093. The reversal of 1663478080 is 808743661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353181 + ... + 357859.

Almost surely, 2^1663478080 is an apocalyptic number.

1663478080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663478080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182489920).

1663478080 is an abundant number, since it is smaller than the sum of its proper divisors (2701501760).

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

1663478080 is a wasteful number, since it uses less digits than its factorization.

1663478080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808 (or 4798 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1663478080 is about 40785.7582987003. The cubic root of 1663478080 is about 1184.8745213027.

The spelling of 1663478080 in words is "one billion, six hundred sixty-three million, four hundred seventy-eight thousand, eighty".