42065663 has 4 divisors (see below), whose sum is σ = 42078768. Its totient is φ = 42052560.

The previous prime is 42065651. The next prime is 42065669. The reversal of 42065663 is 36656024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42065663 - 2¹⁰ = 42064639 is a prime.

It is a super-3 number, since 3×42065663³ (a number of 24 digits) contains 333 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 (42065669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (10519692).

Almost surely, 2^42065663 is an apocalyptic number.

42065663 is a deficient number, since it is larger than the sum of its proper divisors (13105).

42065663 is an equidigital number, since it uses as much as digits as its factorization.

42065663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13104.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 42065663 is about 6485.8047303322. The cubic root of 42065663 is about 347.7837180550.

The spelling of 42065663 in words is "forty-two million, sixty-five thousand, six hundred sixty-three".