42664678 has 16 divisors (see below), whose sum is σ = 76320000. Its totient is φ = 17489736.

The previous prime is 42664667. The next prime is 42664693. The reversal of 42664678 is 87646624.

It is a congruent number.

It is an unprimeable number.

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, 65928 + ... + 66571.

It is an arithmetic number, because the mean of its divisors is an integer number (4770000).

Almost surely, 2^42664678 is an apocalyptic number.

42664678 is a deficient number, since it is larger than the sum of its proper divisors (33655322).

42664678 is a wasteful number, since it uses less digits than its factorization.

42664678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132531.

The product of its digits is 387072, while the sum is 43.

The square root of 42664678 is about 6531.8204200667. The cubic root of 42664678 is about 349.4267568716.

The spelling of 42664678 in words is "forty-two million, six hundred sixty-four thousand, six hundred seventy-eight".