665023132 has 6 divisors (see below), whose sum is σ = 1163790488. Its totient is φ = 332511564.

The previous prime is 665023109. The next prime is 665023169. The reversal of 665023132 is 231320566.

It is a self number, because there is not a number n which added to its sum of digits gives 665023132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83127888 + ... + 83127895.

Almost surely, 2^665023132 is an apocalyptic number.

It is an amenable number.

665023132 is a deficient number, since it is larger than the sum of its proper divisors (498767356).

665023132 is a wasteful number, since it uses less digits than its factorization.

665023132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166255787 (or 166255785 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 665023132 is about 25788.0424227974. The cubic root of 665023132 is about 872.8619941078.

Adding to 665023132 its reverse (231320566), we get a palindrome (896343698).

The spelling of 665023132 in words is "six hundred sixty-five million, twenty-three thousand, one hundred thirty-two".