665532936 has 160 divisors (see below), whose sum is σ = 1924263000. Its totient is φ = 214824960.

The previous prime is 665532929. The next prime is 665532937. The reversal of 665532936 is 639235566.

665532936 is a `hidden beast` number, since 6 + 6 + 553 + 2 + 93 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 70660836 + 594872100 = 8406^2 + 24390^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665532891 and 665532900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665532937) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4466590 + ... + 4466738.

Almost surely, 2^665532936 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 665532936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962131500).

665532936 is an abundant number, since it is smaller than the sum of its proper divisors (1258730064).

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

665532936 is a wasteful number, since it uses less digits than its factorization.

665532936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 328 counting only the distinct ones).

The product of its digits is 874800, while the sum is 45.

The square root of 665532936 is about 25797.9250328394. The cubic root of 665532936 is about 873.0849812763.

The spelling of 665532936 in words is "six hundred sixty-five million, five hundred thirty-two thousand, nine hundred thirty-six".