66004704 has 72 divisors (see below), whose sum is σ = 193781952. Its totient is φ = 21288960.

The previous prime is 66004669. The next prime is 66004709. The reversal of 66004704 is 40740066.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66004709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5232 + ... + 12624.

It is an arithmetic number, because the mean of its divisors is an integer number (2691416).

Almost surely, 2^66004704 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 66004704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96890976).

66004704 is an abundant number, since it is smaller than the sum of its proper divisors (127777248).

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

66004704 is a wasteful number, since it uses less digits than its factorization.

66004704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7440 (or 7429 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 66004704 is about 8124.3279106644. The cubic root of 66004704 is about 404.1336028407.

The spelling of 66004704 in words is "sixty-six million, four thousand, seven hundred four".