66648678 has 8 divisors (see below), whose sum is σ = 133297368. Its totient is φ = 22216224.

The previous prime is 66648649. The next prime is 66648689. The reversal of 66648678 is 87684666.

It is a sphenic number, since it is the product of 3 distinct primes.

66648678 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66648678.

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 3 ways as a sum of consecutive naturals, for example, 5554051 + ... + 5554062.

It is an arithmetic number, because the mean of its divisors is an integer number (16662171).

Almost surely, 2^66648678 is an apocalyptic number.

66648678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66648678 is a wasteful number, since it uses less digits than its factorization.

66648678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11108118.

The product of its digits is 2322432, while the sum is 51.

The square root of 66648678 is about 8163.8641585955. The cubic root of 66648678 is about 405.4436595227.

The spelling of 66648678 in words is "sixty-six million, six hundred forty-eight thousand, six hundred seventy-eight".