65328871 has 4 divisors (see below), whose sum is σ = 66436200. Its totient is φ = 64221544.

The previous prime is 65328869. The next prime is 65328877. The reversal of 65328871 is 17882356.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65328871 - 2¹ = 65328869 is a prime.

It is a super-2 number, since 2×65328871² = 8535722772269282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65328877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553576 + ... + 553693.

It is an arithmetic number, because the mean of its divisors is an integer number (16609050).

Almost surely, 2^65328871 is an apocalyptic number.

65328871 is a deficient number, since it is larger than the sum of its proper divisors (1107329).

65328871 is a wasteful number, since it uses less digits than its factorization.

65328871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107328.

The product of its digits is 80640, while the sum is 40.

The square root of 65328871 is about 8082.6277286536. The cubic root of 65328871 is about 402.7495380463.

The spelling of 65328871 in words is "sixty-five million, three hundred twenty-eight thousand, eight hundred seventy-one".