65330409 has 4 divisors (see below), whose sum is σ = 87107216. Its totient is φ = 43553604.

The previous prime is 65330407. The next prime is 65330429. The reversal of 65330409 is 90403356.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65330409 - 2¹ = 65330407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65330407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10888399 + ... + 10888404.

It is an arithmetic number, because the mean of its divisors is an integer number (21776804).

Almost surely, 2^65330409 is an apocalyptic number.

It is an amenable number.

65330409 is a deficient number, since it is larger than the sum of its proper divisors (21776807).

65330409 is a wasteful number, since it uses less digits than its factorization.

65330409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21776806.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 65330409 is about 8082.7228704193. The cubic root of 65330409 is about 402.7526985884.

The spelling of 65330409 in words is "sixty-five million, three hundred thirty thousand, four hundred nine".