66766142058 has 384 divisors, whose sum is σ = 180740947968. Its totient is φ = 16066512000.

The previous prime is 66766142041. The next prime is 66766142123. The reversal of 66766142058 is 85024166766.

It is a self number, because there is not a number n which added to its sum of digits gives 66766142058.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 525717591 + ... + 525717717.

It is an arithmetic number, because the mean of its divisors is an integer number (470679552).

Almost surely, 2^66766142058 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66766142058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90370473984).

66766142058 is an abundant number, since it is smaller than the sum of its proper divisors (113974805910).

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

66766142058 is a wasteful number, since it uses less digits than its factorization.

66766142058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 66766142058 in words is "sixty-six billion, seven hundred sixty-six million, one hundred forty-two thousand, fifty-eight".