65612271 has 16 divisors (see below), whose sum is σ = 89458560. Its totient is φ = 42762720.

The previous prime is 65612257. The next prime is 65612273. The reversal of 65612271 is 17221656.

It is not a de Polignac number, because 65612271 - 2⁹ = 65611759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65612273) 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 15 ways as a sum of consecutive naturals, for example, 31756 + ... + 33758.

It is an arithmetic number, because the mean of its divisors is an integer number (5591160).

Almost surely, 2^65612271 is an apocalyptic number.

65612271 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

65612271 is a deficient number, since it is larger than the sum of its proper divisors (23846289).

65612271 is a wasteful number, since it uses less digits than its factorization.

65612271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its digits is 5040, while the sum is 30.

The square root of 65612271 is about 8100.1401839721. The cubic root of 65612271 is about 403.3310806665.

The spelling of 65612271 in words is "sixty-five million, six hundred twelve thousand, two hundred seventy-one".