65869812 has 18 divisors (see below), whose sum is σ = 166504338. Its totient is φ = 21956592.

The previous prime is 65869807. The next prime is 65869829. The reversal of 65869812 is 21896856.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 26255376 = 6294^2 + 5124^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 914823 + ... + 914894.

It is an arithmetic number, because the mean of its divisors is an integer number (9250241).

Almost surely, 2^65869812 is an apocalyptic number.

It is an amenable number.

65869812 is an abundant number, since it is smaller than the sum of its proper divisors (100634526).

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

65869812 is a wasteful number, since it uses less digits than its factorization.

65869812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829727 (or 1829722 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 65869812 is about 8116.0219319566. The cubic root of 65869812 is about 403.8581095027.

The spelling of 65869812 in words is "sixty-five million, eight hundred sixty-nine thousand, eight hundred twelve".