663273984 has 80 divisors (see below), whose sum is σ = 1796224320. Its totient is φ = 217436160.

The previous prime is 663273979. The next prime is 663274009. The reversal of 663273984 is 489372366.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90157 + ... + 97235.

It is an arithmetic number, because the mean of its divisors is an integer number (22452804).

Almost surely, 2^663273984 is an apocalyptic number.

663273984 is a gapful number since it is divisible by the number (64) 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 663273984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898112160).

663273984 is an abundant number, since it is smaller than the sum of its proper divisors (1132950336).

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

663273984 is an equidigital number, since it uses as much as digits as its factorization.

663273984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161 (or 7145 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 663273984 is about 25754.1061580479. The cubic root of 663273984 is about 872.0960531623.

The spelling of 663273984 in words is "six hundred sixty-three million, two hundred seventy-three thousand, nine hundred eighty-four".