65516447 has 4 divisors (see below), whose sum is σ = 65702400. Its totient is φ = 65330496.

The previous prime is 65516431. The next prime is 65516459. The reversal of 65516447 is 74461556.

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 65516447 - 2⁴ = 65516431 is a prime.

It is a super-3 number, since 3×65516447³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65516447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65516417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92447 + ... + 93152.

It is an arithmetic number, because the mean of its divisors is an integer number (16425600).

Almost surely, 2^65516447 is an apocalyptic number.

65516447 is a deficient number, since it is larger than the sum of its proper divisors (185953).

65516447 is a wasteful number, since it uses less digits than its factorization.

65516447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185952.

The product of its digits is 100800, while the sum is 38.

The square root of 65516447 is about 8094.2230633953. The cubic root of 65516447 is about 403.1346355648.

The spelling of 65516447 in words is "sixty-five million, five hundred sixteen thousand, four hundred forty-seven".