68933121660 has 96 divisors (see below), whose sum is σ = 230955439680. Its totient is φ = 16968151296.

The previous prime is 68933121659. The next prime is 68933121689. The reversal of 68933121660 is 6612133986.

It is a super-3 number, since 3×68933121660³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4902747 + ... + 4916786.

It is an arithmetic number, because the mean of its divisors is an integer number (2405785830).

Almost surely, 2^68933121660 is an apocalyptic number.

68933121660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68933121660 is an abundant number, since it is smaller than the sum of its proper divisors (162022318020).

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

68933121660 is a wasteful number, since it uses less digits than its factorization.

68933121660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9819564 (or 9819556 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 68933121660 in words is "sixty-eight billion, nine hundred thirty-three million, one hundred twenty-one thousand, six hundred sixty".