68665384768 has 14 divisors (see below), whose sum is σ = 136257873026. Its totient is φ = 34332692352.

The previous prime is 68665384699. The next prime is 68665384783. The reversal of 68665384768 is 86748356686.

It can be written as a sum of positive squares in only one way, i.e., 63045183744 + 5620201024 = 251088^2 + 74968^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536448255 + ... + 536448382.

Almost surely, 2^68665384768 is an apocalyptic number.

It is an amenable number.

68665384768 is a deficient number, since it is larger than the sum of its proper divisors (67592488258).

68665384768 is a wasteful number, since it uses less digits than its factorization.

68665384768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072896649 (or 1072896639 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 67.

The spelling of 68665384768 in words is "sixty-eight billion, six hundred sixty-five million, three hundred eighty-four thousand, seven hundred sixty-eight".