665045232 has 80 divisors (see below), whose sum is σ = 1790456832. Its totient is φ = 212474880.

The previous prime is 665045221. The next prime is 665045237. The reversal of 665045232 is 232540566.

665045232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 665045193 and 665045202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665045237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157128 + ... + 161304.

Almost surely, 2^665045232 is an apocalyptic number.

665045232 is a gapful number since it is divisible by the number (62) 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 665045232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895228416).

665045232 is an abundant number, since it is smaller than the sum of its proper divisors (1125411600).

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

665045232 is a wasteful number, since it uses less digits than its factorization.

665045232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4320 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 665045232 is about 25788.4709124058. The cubic root of 665045232 is about 872.8716629626.

Adding to 665045232 its reverse (232540566), we get a palindrome (897585798).

The spelling of 665045232 in words is "six hundred sixty-five million, forty-five thousand, two hundred thirty-two".