66655204 has 48 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 25263360.

The previous prime is 66655201. The next prime is 66655213. The reversal of 66655204 is 40255666.

It is a self number, because there is not a number n which added to its sum of digits gives 66655204.

It is not an unprimeable number, because it can be changed into a prime (66655201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8472 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (3112200).

Almost surely, 2^66655204 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 66655204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74692800).

66655204 is an abundant number, since it is smaller than the sum of its proper divisors (82730396).

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

66655204 is a wasteful number, since it uses less digits than its factorization.

66655204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 66655204 is about 8164.2638369911. The cubic root of 66655204 is about 405.4568922881.

The spelling of 66655204 in words is "sixty-six million, six hundred fifty-five thousand, two hundred four".