66644304 has 40 divisors (see below), whose sum is σ = 173054400. Its totient is φ = 22099968.

The previous prime is 66644299. The next prime is 66644309. The reversal of 66644304 is 40344666.

It is an interprime number because it is at equal distance from previous prime (66644299) and next prime (66644309).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66644309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6064 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (4326360).

Almost surely, 2^66644304 is an apocalyptic number.

It is an amenable number.

66644304 is an abundant number, since it is smaller than the sum of its proper divisors (106410096).

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

66644304 is a wasteful number, since it uses less digits than its factorization.

66644304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7187 (or 7181 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 66644304 is about 8163.5962663522. The cubic root of 66644304 is about 405.4347898826.

The spelling of 66644304 in words is "sixty-six million, six hundred forty-four thousand, three hundred four".