68669364920 has 32 divisors (see below), whose sum is σ = 166391154720. Its totient is φ = 25354842240.

The previous prime is 68669364913. The next prime is 68669364983. The reversal of 68669364920 is 2946396686.

It is a super-2 number, since 2×68669364920² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68669364920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66027716 + ... + 66028755.

It is an arithmetic number, because the mean of its divisors is an integer number (5199723585).

Almost surely, 2^68669364920 is an apocalyptic number.

It is an amenable number.

68669364920 is an abundant number, since it is smaller than the sum of its proper divisors (97721789800).

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

68669364920 is a wasteful number, since it uses less digits than its factorization.

68669364920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132056495 (or 132056491 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 68669364920 in words is "sixty-eight billion, six hundred sixty-nine million, three hundred sixty-four thousand, nine hundred twenty".