66726961080 has 256 divisors, whose sum is σ = 230041728000. Its totient is φ = 15346962432.

The previous prime is 66726961073. The next prime is 66726961109. The reversal of 66726961080 is 8016962766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2148301 + ... + 2179139.

It is an arithmetic number, because the mean of its divisors is an integer number (898600500).

Almost surely, 2^66726961080 is an apocalyptic number.

66726961080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66726961080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115020864000).

66726961080 is an abundant number, since it is smaller than the sum of its proper divisors (163314766920).

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

66726961080 is a wasteful number, since it uses less digits than its factorization.

66726961080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958 (or 30954 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 66726961080 in words is "sixty-six billion, seven hundred twenty-six million, nine hundred sixty-one thousand, eighty".