42857666 has 8 divisors (see below), whose sum is σ = 64494144. Its totient is φ = 21359620.

The previous prime is 42857657. The next prime is 42857681. The reversal of 42857666 is 66675824.

42857666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33830 + ... + 35073.

It is an arithmetic number, because the mean of its divisors is an integer number (8061768).

Almost surely, 2^42857666 is an apocalyptic number.

42857666 is a deficient number, since it is larger than the sum of its proper divisors (21636478).

42857666 is a wasteful number, since it uses less digits than its factorization.

42857666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69216.

The product of its digits is 483840, while the sum is 44.

The square root of 42857666 is about 6546.5766626535. The cubic root of 42857666 is about 349.9528262952.

The spelling of 42857666 in words is "forty-two million, eight hundred fifty-seven thousand, six hundred sixty-six".