665626532 has 12 divisors (see below), whose sum is σ = 1215492096. Its totient is φ = 318343080.

The previous prime is 665626519. The next prime is 665626547. The reversal of 665626532 is 235626566.

It is a self number, because there is not a number n which added to its sum of digits gives 665626532.

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, 3617444 + ... + 3617627.

It is an arithmetic number, because the mean of its divisors is an integer number (101291008).

Almost surely, 2^665626532 is an apocalyptic number.

It is an amenable number.

665626532 is a deficient number, since it is larger than the sum of its proper divisors (549865564).

665626532 is a wasteful number, since it uses less digits than its factorization.

665626532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235098 (or 7235096 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 665626532 is about 25799.7389909278. The cubic root of 665626532 is about 873.1259075912.

The spelling of 665626532 in words is "six hundred sixty-five million, six hundred twenty-six thousand, five hundred thirty-two".