66142142 has 8 divisors (see below), whose sum is σ = 108232632. Its totient is φ = 30064600.

The previous prime is 66142129. The next prime is 66142147. The reversal of 66142142 is 24124166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66142147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503209 + ... + 1503252.

It is an arithmetic number, because the mean of its divisors is an integer number (13529079).

Almost surely, 2^66142142 is an apocalyptic number.

66142142 is a deficient number, since it is larger than the sum of its proper divisors (42090490).

66142142 is a wasteful number, since it uses less digits than its factorization.

66142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006474.

The product of its digits is 2304, while the sum is 26.

The square root of 66142142 is about 8132.7819348609. The cubic root of 66142142 is about 404.4139101707.

The spelling of 66142142 in words is "sixty-six million, one hundred forty-two thousand, one hundred forty-two".