68665963392 has 192 divisors, whose sum is σ = 216402404400. Its totient is φ = 20769619968.

The previous prime is 68665963381. The next prime is 68665963397. The reversal of 68665963392 is 29336956686.

68665963392 is a `hidden beast` number, since 6 + 8 + 6 + 6 + 596 + 3 + 39 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665963397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 844728 + ... + 922440.

Almost surely, 2^68665963392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68665963392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108201202200).

68665963392 is an abundant number, since it is smaller than the sum of its proper divisors (147736441008).

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

68665963392 is a wasteful number, since it uses less digits than its factorization.

68665963392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77805 (or 77790 counting only the distinct ones).

The product of its digits is 75582720, while the sum is 63.

The spelling of 68665963392 in words is "sixty-eight billion, six hundred sixty-five million, nine hundred sixty-three thousand, three hundred ninety-two".