42066719 has 4 divisors (see below), whose sum is σ = 42659280. Its totient is φ = 41474160.

The previous prime is 42066707. The next prime is 42066751. The reversal of 42066719 is 91766024.

42066719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42066719 - 2²⁴ = 25289503 is a prime.

It is a super-2 number, since 2×42066719² = 3539217694849922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42066119) 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 3 ways as a sum of consecutive naturals, for example, 296174 + ... + 296315.

It is an arithmetic number, because the mean of its divisors is an integer number (10664820).

Almost surely, 2^42066719 is an apocalyptic number.

42066719 is a deficient number, since it is larger than the sum of its proper divisors (592561).

42066719 is an equidigital number, since it uses as much as digits as its factorization.

42066719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592560.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 42066719 is about 6485.8861383777. The cubic root of 42066719 is about 347.7866282396.

The spelling of 42066719 in words is "forty-two million, sixty-six thousand, seven hundred nineteen".