66017041660 has 96 divisors (see below), whose sum is σ = 148440257280. Its totient is φ = 24588748800.

The previous prime is 66017041639. The next prime is 66017041661. The reversal of 66017041660 is 6614071066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66017041661) by changing a digit.

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, 12498220 + ... + 12503500.

It is an arithmetic number, because the mean of its divisors is an integer number (1546252680).

Almost surely, 2^66017041660 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 66017041660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74220128640).

66017041660 is an abundant number, since it is smaller than the sum of its proper divisors (82423215620).

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

66017041660 is a wasteful number, since it uses less digits than its factorization.

66017041660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867 (or 5865 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 66017041660 in words is "sixty-six billion, seventeen million, forty-one thousand, six hundred sixty".