65772871 has 4 divisors (see below), whose sum is σ = 66055392. Its totient is φ = 65490352.

The previous prime is 65772859. The next prime is 65772901. The reversal of 65772871 is 17827756.

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 65772871 - 2⁷ = 65772743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65772821) 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, 140911 + ... + 141376.

It is an arithmetic number, because the mean of its divisors is an integer number (16513848).

Almost surely, 2^65772871 is an apocalyptic number.

65772871 is a deficient number, since it is larger than the sum of its proper divisors (282521).

65772871 is a wasteful number, since it uses less digits than its factorization.

65772871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282520.

The product of its digits is 164640, while the sum is 43.

The square root of 65772871 is about 8110.0475337695. The cubic root of 65772871 is about 403.6598920923.

The spelling of 65772871 in words is "sixty-five million, seven hundred seventy-two thousand, eight hundred seventy-one".