665034213 has 8 divisors (see below), whose sum is σ = 925265088. Its totient is φ = 424079744.

The previous prime is 665034187. The next prime is 665034221. The reversal of 665034213 is 312430566.

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

It is a cyclic number.

It is not a de Polignac number, because 665034213 - 2¹⁶ = 664968677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665034283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4819020 + ... + 4819157.

It is an arithmetic number, because the mean of its divisors is an integer number (115658136).

Almost surely, 2^665034213 is an apocalyptic number.

It is an amenable number.

665034213 is a deficient number, since it is larger than the sum of its proper divisors (260230875).

665034213 is a wasteful number, since it uses less digits than its factorization.

665034213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9638203.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 665034213 is about 25788.2572695403. The cubic root of 665034213 is about 872.8668421246.

Adding to 665034213 its reverse (312430566), we get a palindrome (977464779).

The spelling of 665034213 in words is "six hundred sixty-five million, thirty-four thousand, two hundred thirteen".