66238304 has 36 divisors (see below), whose sum is σ = 143347932. Its totient is φ = 30106560.

The previous prime is 66238279. The next prime is 66238309. The reversal of 66238304 is 40383266.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66238309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4682 + ... + 12425.

It is an arithmetic number, because the mean of its divisors is an integer number (3981887).

Almost surely, 2^66238304 is an apocalyptic number.

It is an amenable number.

66238304 is an abundant number, since it is smaller than the sum of its proper divisors (77109628).

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

66238304 is a wasteful number, since it uses less digits than its factorization.

66238304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17139 (or 17120 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 66238304 is about 8138.6917867677. The cubic root of 66238304 is about 404.6098035293.

The spelling of 66238304 in words is "sixty-six million, two hundred thirty-eight thousand, three hundred four".