66938680060 has 96 divisors (see below), whose sum is σ = 168107692032. Its totient is φ = 21905717760.

The previous prime is 66938680057. The next prime is 66938680097. The reversal of 66938680060 is 6008683966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211179 + ... + 422461.

It is an arithmetic number, because the mean of its divisors is an integer number (1751121792).

Almost surely, 2^66938680060 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 66938680060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84053846016).

66938680060 is an abundant number, since it is smaller than the sum of its proper divisors (101169011972).

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

66938680060 is a wasteful number, since it uses less digits than its factorization.

66938680060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211403 (or 211401 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 66938680060 in words is "sixty-six billion, nine hundred thirty-eight million, six hundred eighty thousand, sixty".