665543032 has 64 divisors (see below), whose sum is σ = 1558828800. Its totient is φ = 258800640.

The previous prime is 665543017. The next prime is 665543033. The reversal of 665543032 is 230345566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665543033) 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, 571683 + ... + 572845.

It is an arithmetic number, because the mean of its divisors is an integer number (24356700).

Almost surely, 2^665543032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665543032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779414400).

665543032 is an abundant number, since it is smaller than the sum of its proper divisors (893285768).

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

665543032 is a wasteful number, since it uses less digits than its factorization.

665543032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 665543032 is about 25798.1207067492. The cubic root of 665543032 is about 873.0893960949.

Adding to 665543032 its reverse (230345566), we get a palindrome (895888598).

The spelling of 665543032 in words is "six hundred sixty-five million, five hundred forty-three thousand, thirty-two".