66704512 has 64 divisors (see below), whose sum is σ = 153489600. Its totient is φ = 28283904.

The previous prime is 66704501. The next prime is 66704543. The reversal of 66704512 is 21540766.

It is a happy number.

66704512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97323 + ... + 98005.

It is an arithmetic number, because the mean of its divisors is an integer number (2398275).

Almost surely, 2^66704512 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 66704512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76744800).

66704512 is an abundant number, since it is smaller than the sum of its proper divisors (86785088).

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

66704512 is a wasteful number, since it uses less digits than its factorization.

66704512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66704512 is about 8167.2830243601. The cubic root of 66704512 is about 405.5568461779.

The spelling of 66704512 in words is "sixty-six million, seven hundred four thousand, five hundred twelve".