65678285 has 4 divisors (see below), whose sum is σ = 78813948. Its totient is φ = 52542624.

The previous prime is 65678251. The next prime is 65678287. The reversal of 65678285 is 58287656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 46485124 = 4381^2 + 6818^2 .

It is a cyclic number.

It is not a de Polignac number, because 65678285 - 2¹⁴ = 65661901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65678287) 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, 6567824 + ... + 6567833.

It is an arithmetic number, because the mean of its divisors is an integer number (19703487).

Almost surely, 2^65678285 is an apocalyptic number.

It is an amenable number.

65678285 is a deficient number, since it is larger than the sum of its proper divisors (13135663).

65678285 is a wasteful number, since it uses less digits than its factorization.

65678285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135662.

The product of its digits is 806400, while the sum is 47.

The square root of 65678285 is about 8104.2140272823. The cubic root of 65678285 is about 403.4663021885.

The spelling of 65678285 in words is "sixty-five million, six hundred seventy-eight thousand, two hundred eighty-five".