65840427 has 24 divisors (see below), whose sum is σ = 98353424. Its totient is φ = 42410304.

The previous prime is 65840413. The next prime is 65840449. The reversal of 65840427 is 72404856.

It is not a de Polignac number, because 65840427 - 2¹¹ = 65838379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65840391 and 65840400.

It is not an unprimeable number, because it can be changed into a prime (65847427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53673 + ... + 54885.

Almost surely, 2^65840427 is an apocalyptic number.

65840427 is a deficient number, since it is larger than the sum of its proper divisors (32512997).

65840427 is a wasteful number, since it uses less digits than its factorization.

65840427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 65840427 is about 8114.2114219436. The cubic root of 65840427 is about 403.7980458947.

The spelling of 65840427 in words is "sixty-five million, eight hundred forty thousand, four hundred twenty-seven".