66710304 has 144 divisors (see below), whose sum is σ = 205837632. Its totient is φ = 21212928.

The previous prime is 66710291. The next prime is 66710323. The reversal of 66710304 is 40301766.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178662 + ... + 179034.

It is an arithmetic number, because the mean of its divisors is an integer number (1429428).

Almost surely, 2^66710304 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 66710304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102918816).

66710304 is an abundant number, since it is smaller than the sum of its proper divisors (139127328).

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

66710304 is a wasteful number, since it uses less digits than its factorization.

66710304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 66710304 is about 8167.6376021467. The cubic root of 66710304 is about 405.5685841008.

The spelling of 66710304 in words is "sixty-six million, seven hundred ten thousand, three hundred four".