663842382 has 128 divisors (see below), whose sum is σ = 1628467200. Its totient is φ = 176463360.

The previous prime is 663842341. The next prime is 663842449. The reversal of 663842382 is 283248366.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4455244 + ... + 4455392.

It is an arithmetic number, because the mean of its divisors is an integer number (12722400).

Almost surely, 2^663842382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663842382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814233600).

663842382 is an abundant number, since it is smaller than the sum of its proper divisors (964624818).

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

663842382 is a wasteful number, since it uses less digits than its factorization.

663842382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its digits is 331776, while the sum is 42.

The square root of 663842382 is about 25765.1388895927. The cubic root of 663842382 is about 872.3450986219.

The spelling of 663842382 in words is "six hundred sixty-three million, eight hundred forty-two thousand, three hundred eighty-two".