65778908 has 12 divisors (see below), whose sum is σ = 123968040. Its totient is φ = 30359472.

The previous prime is 65778907. The next prime is 65778917. The reversal of 65778908 is 80987756.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65778907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 632438 + ... + 632541.

It is an arithmetic number, because the mean of its divisors is an integer number (10330670).

Almost surely, 2^65778908 is an apocalyptic number.

It is an amenable number.

65778908 is a deficient number, since it is larger than the sum of its proper divisors (58189132).

65778908 is a wasteful number, since it uses less digits than its factorization.

65778908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264996 (or 1264994 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 65778908 is about 8110.4197178691. The cubic root of 65778908 is about 403.6722417646.

The spelling of 65778908 in words is "sixty-five million, seven hundred seventy-eight thousand, nine hundred eight".