65768205178668 has 48 divisors (see below), whose sum is σ = 160925509190880. Its totient is φ = 20876822797824.

The previous prime is 65768205178661. The next prime is 65768205178703. The reversal of 65768205178668 is 86687150286756.

It is a self number, because there is not a number n which added to its sum of digits gives 65768205178668.

It is not an unprimeable number, because it can be changed into a prime (65768205178661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294420455 + ... + 1294471262.

It is an arithmetic number, because the mean of its divisors is an integer number (3352614774810).

Almost surely, 2^{65768205178668} is an apocalyptic number.

It is an amenable number.

65768205178668 is an abundant number, since it is smaller than the sum of its proper divisors (95157304012212).

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

65768205178668 is a wasteful number, since it uses less digits than its factorization.

65768205178668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588891826 (or 2588891824 counting only the distinct ones).

The product of its (nonzero) digits is 1625702400, while the sum is 75.

The spelling of 65768205178668 in words is "sixty-five trillion, seven hundred sixty-eight billion, two hundred five million, one hundred seventy-eight thousand, six hundred sixty-eight".