1663662080 has 96 divisors (see below), whose sum is σ = 4100634720. Its totient is φ = 647331840.

The previous prime is 1663662073. The next prime is 1663662107. The reversal of 1663662080 is 802663661.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 376685 + ... + 381075.

It is an arithmetic number, because the mean of its divisors is an integer number (42714945).

Almost surely, 2^1663662080 is an apocalyptic number.

1663662080 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 1663662080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2050317360).

1663662080 is an abundant number, since it is smaller than the sum of its proper divisors (2436972640).

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

1663662080 is an equidigital number, since it uses as much as digits as its factorization.

1663662080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455 (or 4435 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1663662080 is about 40788.0139256620. The cubic root of 1663662080 is about 1184.9182066542.

The spelling of 1663662080 in words is "one billion, six hundred sixty-three million, six hundred sixty-two thousand, eighty".