42666668 has 24 divisors (see below), whose sum is σ = 86247504. Its totient is φ = 18252800.

The previous prime is 42666667. The next prime is 42666671. The reversal of 42666668 is 86666624.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (42666667) 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 7 ways as a sum of consecutive naturals, for example, 27773 + ... + 29268.

It is an arithmetic number, because the mean of its divisors is an integer number (3593646).

Almost surely, 2^42666668 is an apocalyptic number.

It is an amenable number.

42666668 is an abundant number, since it is smaller than the sum of its proper divisors (43580836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42666668 is a wasteful number, since it uses less digits than its factorization.

42666668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57073 (or 57071 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 42666668 is about 6531.9727494839. The cubic root of 42666668 is about 349.4321895344.

Subtracting from 42666668 its sum of digits (44), we obtain a palindrome (42666624).

It can be divided in two parts, 42666 and 668, that added together give a palindrome (43334).

The spelling of 42666668 in words is "forty-two million, six hundred sixty-six thousand, six hundred sixty-eight".