142708666 has 4 divisors (see below), whose sum is σ = 214063002. Its totient is φ = 71354332.

The previous prime is 142708661. The next prime is 142708679. The reversal of 142708666 is 666807241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 135839025 + 6869641 = 11655^2 + 2621^2 .

It is not an unprimeable number, because it can be changed into a prime (142708661) 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 as a sum of consecutive naturals, namely, 35677165 + ... + 35677168.

Almost surely, 2^142708666 is an apocalyptic number.

142708666 is a deficient number, since it is larger than the sum of its proper divisors (71354336).

142708666 is an equidigital number, since it uses as much as digits as its factorization.

142708666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71354335.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 142708666 is about 11946.0732460504. The cubic root of 142708666 is about 522.5767883908.

The spelling of 142708666 in words is "one hundred forty-two million, seven hundred eight thousand, six hundred sixty-six".