665765232 has 120 divisors (see below), whose sum is σ = 1915710720. Its totient is φ = 199056000.

The previous prime is 665765231. The next prime is 665765239. The reversal of 665765232 is 232567566.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665765231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 458107 + ... + 459557.

It is an arithmetic number, because the mean of its divisors is an integer number (15964256).

Almost surely, 2^665765232 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 665765232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957855360).

665765232 is an abundant number, since it is smaller than the sum of its proper divisors (1249945488).

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

665765232 is a wasteful number, since it uses less digits than its factorization.

665765232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563 (or 1546 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 665765232 is about 25802.4268626034. The cubic root of 665765232 is about 873.1865492809.

The spelling of 665765232 in words is "six hundred sixty-five million, seven hundred sixty-five thousand, two hundred thirty-two".