142188666 has 16 divisors (see below), whose sum is σ = 299344800. Its totient is φ = 44901648.

The previous prime is 142188637. The next prime is 142188667. The reversal of 142188666 is 666881241.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142188667) 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 7 ways as a sum of consecutive naturals, for example, 623521 + ... + 623748.

It is an arithmetic number, because the mean of its divisors is an integer number (18709050).

Almost surely, 2^142188666 is an apocalyptic number.

142188666 is an abundant number, since it is smaller than the sum of its proper divisors (157156134).

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

142188666 is a wasteful number, since it uses less digits than its factorization.

142188666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247293.

The product of its digits is 110592, while the sum is 42.

The square root of 142188666 is about 11924.2889096164. The cubic root of 142188666 is about 521.9412963741.

The spelling of 142188666 in words is "one hundred forty-two million, one hundred eighty-eight thousand, six hundred sixty-six".