65783868 has 12 divisors (see below), whose sum is σ = 153495720. Its totient is φ = 21927952.

The previous prime is 65783831. The next prime is 65783869. The reversal of 65783868 is 86838756.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65783868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65783869) 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, 2740983 + ... + 2741006.

It is an arithmetic number, because the mean of its divisors is an integer number (12791310).

Almost surely, 2^65783868 is an apocalyptic number.

It is an amenable number.

65783868 is an abundant number, since it is smaller than the sum of its proper divisors (87711852).

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

65783868 is a wasteful number, since it uses less digits than its factorization.

65783868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481996 (or 5481994 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 65783868 is about 8110.7254915944. The cubic root of 65783868 is about 403.6823876916.

The spelling of 65783868 in words is "sixty-five million, seven hundred eighty-three thousand, eight hundred sixty-eight".