66147704 has 16 divisors (see below), whose sum is σ = 141745200. Its totient is φ = 28348992.

The previous prime is 66147703. The next prime is 66147779. The reversal of 66147704 is 40774166.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66147703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590549 + ... + 590660.

It is an arithmetic number, because the mean of its divisors is an integer number (8859075).

Almost surely, 2^66147704 is an apocalyptic number.

It is an amenable number.

66147704 is an abundant number, since it is smaller than the sum of its proper divisors (75597496).

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

66147704 is a wasteful number, since it uses less digits than its factorization.

66147704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181222 (or 1181218 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 66147704 is about 8133.1238770844. The cubic root of 66147704 is about 404.4252457935.

The spelling of 66147704 in words is "sixty-six million, one hundred forty-seven thousand, seven hundred four".