66884608 has 132 divisors (see below), whose sum is σ = 164284032. Its totient is φ = 27095040.

The previous prime is 66884591. The next prime is 66884663. The reversal of 66884608 is 80648866.

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 11 ways as a sum of consecutive naturals, for example, 1555435 + ... + 1555477.

It is an arithmetic number, because the mean of its divisors is an integer number (1244576).

Almost surely, 2^66884608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66884608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82142016).

66884608 is an abundant number, since it is smaller than the sum of its proper divisors (97399424).

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

66884608 is a wasteful number, since it uses less digits than its factorization.

66884608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 66884608 is about 8178.3010460609. The cubic root of 66884608 is about 405.9215068233.

The spelling of 66884608 in words is "sixty-six million, eight hundred eighty-four thousand, six hundred eight".