66555304 has 48 divisors (see below), whose sum is σ = 131695200. Its totient is φ = 31520448.

The previous prime is 66555301. The next prime is 66555311. The reversal of 66555304 is 40355566.

It is a self number, because there is not a number n which added to its sum of digits gives 66555304.

It is not an unprimeable number, because it can be changed into a prime (66555301) 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, 646117 + ... + 646219.

It is an arithmetic number, because the mean of its divisors is an integer number (2743650).

Almost surely, 2^66555304 is an apocalyptic number.

It is an amenable number.

66555304 is a deficient number, since it is larger than the sum of its proper divisors (65139896).

66555304 is a wasteful number, since it uses less digits than its factorization.

66555304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 66555304 is about 8158.1434162437. The cubic root of 66555304 is about 405.2542304615.

The spelling of 66555304 in words is "sixty-six million, five hundred fifty-five thousand, three hundred four".