66171837060 has 480 divisors, whose sum is σ = 241634545152. Its totient is φ = 14847805440.

The previous prime is 66171837041. The next prime is 66171837071. The reversal of 66171837060 is 6073817166.

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

It is a junction number, because it is equal to n+sod(n) for n = 66171836997 and 66171837015.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 211411464 + ... + 211411776.

Almost surely, 2^66171837060 is an apocalyptic number.

66171837060 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 66171837060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120817272576).

66171837060 is an abundant number, since it is smaller than the sum of its proper divisors (175462708092).

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

66171837060 is a wasteful number, since it uses less digits than its factorization.

66171837060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 66171837060 in words is "sixty-six billion, one hundred seventy-one million, eight hundred thirty-seven thousand, sixty".