65878985 has 16 divisors (see below), whose sum is σ = 83496000. Its totient is φ = 49761216.

The previous prime is 65878979. The next prime is 65878997. The reversal of 65878985 is 58987856.

It is a cyclic number.

It is not a de Polignac number, because 65878985 - 2⁶ = 65878921 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65878985.

It is an unprimeable number.

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, 32162 + ... + 34148.

It is an arithmetic number, because the mean of its divisors is an integer number (5218500).

Almost surely, 2^65878985 is an apocalyptic number.

It is an amenable number.

65878985 is a deficient number, since it is larger than the sum of its proper divisors (17617015).

65878985 is a wasteful number, since it uses less digits than its factorization.

65878985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360.

The product of its digits is 4838400, while the sum is 56.

The square root of 65878985 is about 8116.5870290412. The cubic root of 65878985 is about 403.8768556646.

The spelling of 65878985 in words is "sixty-five million, eight hundred seventy-eight thousand, nine hundred eighty-five".