66655244 has 12 divisors (see below), whose sum is σ = 117717600. Its totient is φ = 33021648.

The previous prime is 66655243. The next prime is 66655247. The reversal of 66655244 is 44255666.

It is a junction number, because it is equal to n+sod(n) for n = 66655198 and 66655207.

It is not an unprimeable number, because it can be changed into a prime (66655243) 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, 76004 + ... + 76875.

It is an arithmetic number, because the mean of its divisors is an integer number (9809800).

Almost surely, 2^66655244 is an apocalyptic number.

It is an amenable number.

66655244 is a deficient number, since it is larger than the sum of its proper divisors (51062356).

66655244 is a wasteful number, since it uses less digits than its factorization.

66655244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152992 (or 152990 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 66655244 is about 8164.2662866910. The cubic root of 66655244 is about 405.4569733935.

The spelling of 66655244 in words is "sixty-six million, six hundred fifty-five thousand, two hundred forty-four".