42666571 has 16 divisors (see below), whose sum is σ = 46863360. Its totient is φ = 38694240.

The previous prime is 42666523. The next prime is 42666577. The reversal of 42666571 is 17566624.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42666571 - 2⁷ = 42666443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42666571.

It is not an unprimeable number, because it can be changed into a prime (42666577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62685 + ... + 63361.

It is an arithmetic number, because the mean of its divisors is an integer number (2928960).

Almost surely, 2^42666571 is an apocalyptic number.

42666571 is a deficient number, since it is larger than the sum of its proper divisors (4196789).

42666571 is a wasteful number, since it uses less digits than its factorization.

42666571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its digits is 60480, while the sum is 37.

The square root of 42666571 is about 6531.9653244640. The cubic root of 42666571 is about 349.4319247302.

The spelling of 42666571 in words is "forty-two million, six hundred sixty-six thousand, five hundred seventy-one".