65879971 has 4 divisors (see below), whose sum is σ = 66221512. Its totient is φ = 65538432.

The previous prime is 65879959. The next prime is 65879987. The reversal of 65879971 is 17997856.

It is a happy number.

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 65879971 - 2¹⁵ = 65847203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65879921) 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, 170481 + ... + 170866.

It is an arithmetic number, because the mean of its divisors is an integer number (16555378).

Almost surely, 2^65879971 is an apocalyptic number.

65879971 is a deficient number, since it is larger than the sum of its proper divisors (341541).

65879971 is a wasteful number, since it uses less digits than its factorization.

65879971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341540.

The product of its digits is 952560, while the sum is 52.

The square root of 65879971 is about 8116.6477686296. The cubic root of 65879971 is about 403.8788705742.

The spelling of 65879971 in words is "sixty-five million, eight hundred seventy-nine thousand, nine hundred seventy-one".