66648804 has 12 divisors (see below), whose sum is σ = 155513904. Its totient is φ = 22216264.

The previous prime is 66648787. The next prime is 66648817. The reversal of 66648804 is 40884666.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 14.

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, 2777022 + ... + 2777045.

It is an arithmetic number, because the mean of its divisors is an integer number (12959492).

Almost surely, 2^66648804 is an apocalyptic number.

It is an amenable number.

66648804 is an abundant number, since it is smaller than the sum of its proper divisors (88865100).

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

66648804 is a wasteful number, since it uses less digits than its factorization.

66648804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554074 (or 5554072 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 66648804 is about 8163.8718755257. The cubic root of 66648804 is about 405.4439150210.

The spelling of 66648804 in words is "sixty-six million, six hundred forty-eight thousand, eight hundred four".