665135330 has 8 divisors (see below), whose sum is σ = 1197243612. Its totient is φ = 266054128.

The previous prime is 665135311. The next prime is 665135351. The reversal of 665135330 is 33531566.

It can be written as a sum of positive squares in 2 ways, for example, as 617373409 + 47761921 = 24847^2 + 6911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 33256757 + ... + 33256776.

Almost surely, 2^665135330 is an apocalyptic number.

665135330 is a deficient number, since it is larger than the sum of its proper divisors (532108282).

665135330 is a wasteful number, since it uses less digits than its factorization.

665135330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66513540.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 665135330 is about 25790.2177191275. The cubic root of 665135330 is about 872.9110790485.

Adding to 665135330 its reverse (33531566), we get a palindrome (698666896).

The spelling of 665135330 in words is "six hundred sixty-five million, one hundred thirty-five thousand, three hundred thirty".