65816397 has 6 divisors (see below), whose sum is σ = 95068142. Its totient is φ = 43877592.

The previous prime is 65816393. The next prime is 65816411. The reversal of 65816397 is 79361856.

It is a happy number.

65816397 is a `hidden beast` number, since 6 + 5 + 8 + 1 + 639 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65755881 + 60516 = 8109^2 + 246^2 .

It is not a de Polignac number, because 65816397 - 2² = 65816393 is a prime.

It is a super-2 number, since 2×65816397² = 8663596228123218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65816393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3656458 + ... + 3656475.

Almost surely, 2^65816397 is an apocalyptic number.

It is an amenable number.

65816397 is a deficient number, since it is larger than the sum of its proper divisors (29251745).

65816397 is a wasteful number, since it uses less digits than its factorization.

65816397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312939 (or 7312936 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 65816397 is about 8112.7305514235. The cubic root of 65816397 is about 403.7489147443.

The spelling of 65816397 in words is "sixty-five million, eight hundred sixteen thousand, three hundred ninety-seven".