65866864 has 20 divisors (see below), whose sum is σ = 145848304. Its totient is φ = 28228608.

The previous prime is 65866819. The next prime is 65866873. The reversal of 65866864 is 46866856.

It is a happy number.

65866864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293937 + ... + 294160.

Almost surely, 2^65866864 is an apocalyptic number.

It is an amenable number.

65866864 is an abundant number, since it is smaller than the sum of its proper divisors (79981440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65866864 is a wasteful number, since it uses less digits than its factorization.

65866864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588112 (or 588106 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The square root of 65866864 is about 8115.8403138554. The cubic root of 65866864 is about 403.8520845299.

The spelling of 65866864 in words is "sixty-five million, eight hundred sixty-six thousand, eight hundred sixty-four".