665036032 has 36 divisors (see below), whose sum is σ = 1339709140. Its totient is φ = 329453568.

The previous prime is 665036027. The next prime is 665036051. The reversal of 665036032 is 230630566.

It can be written as a sum of positive squares in 2 ways, for example, as 530104576 + 134931456 = 23024^2 + 11616^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 665035985 and 665036003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15988 + ... + 39820.

Almost surely, 2^665036032 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 665036032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669854570).

665036032 is an abundant number, since it is smaller than the sum of its proper divisors (674673108).

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

665036032 is a wasteful number, since it uses less digits than its factorization.

665036032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23958 (or 23944 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 665036032 is about 25788.2925375062. The cubic root of 665036032 is about 872.8676379450.

Adding to 665036032 its reverse (230630566), we get a palindrome (895666598).

The spelling of 665036032 in words is "six hundred sixty-five million, thirty-six thousand, thirty-two".