66424678 has 16 divisors (see below), whose sum is σ = 107289360. Its totient is φ = 30727936.

The previous prime is 66424613. The next prime is 66424681. The reversal of 66424678 is 87642466.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14551 + ... + 18562.

It is an arithmetic number, because the mean of its divisors is an integer number (6705585).

Almost surely, 2^66424678 is an apocalyptic number.

66424678 is a deficient number, since it is larger than the sum of its proper divisors (40864682).

66424678 is a wasteful number, since it uses less digits than its factorization.

66424678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33191.

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

The square root of 66424678 is about 8150.1336185366. The cubic root of 66424678 is about 404.9889302466.

The spelling of 66424678 in words is "sixty-six million, four hundred twenty-four thousand, six hundred seventy-eight".