142709391666 has 192 divisors, whose sum is σ = 355940956800. Its totient is φ = 41040857088.

The previous prime is 142709391661. The next prime is 142709391673. The reversal of 142709391666 is 666193907241.

142709391666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (142709391661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27247600 + ... + 27252836.

It is an arithmetic number, because the mean of its divisors is an integer number (1853859150).

Almost surely, 2^142709391666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142709391666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177970478400).

142709391666 is an abundant number, since it is smaller than the sum of its proper divisors (213231565134).

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

142709391666 is a wasteful number, since it uses less digits than its factorization.

142709391666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433 (or 5430 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 142709391666 in words is "one hundred forty-two billion, seven hundred nine million, three hundred ninety-one thousand, six hundred sixty-six".