665760532 has 18 divisors (see below), whose sum is σ = 1229631018. Its totient is φ = 315359568.

The previous prime is 665760523. The next prime is 665760533. The reversal of 665760532 is 235067566.

It can be written as a sum of positive squares in only one way, i.e., 663783696 + 1976836 = 25764^2 + 1406^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665760533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229083 + ... + 231970.

Almost surely, 2^665760532 is an apocalyptic number.

It is an amenable number.

665760532 is a deficient number, since it is larger than the sum of its proper divisors (563870486).

665760532 is a wasteful number, since it uses less digits than its factorization.

665760532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461095 (or 461074 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 665760532 is about 25802.3357857385. The cubic root of 665760532 is about 873.1844945093.

The spelling of 665760532 in words is "six hundred sixty-five million, seven hundred sixty thousand, five hundred thirty-two".