66608884 has 6 divisors (see below), whose sum is σ = 116565554. Its totient is φ = 33304440.

The previous prime is 66608881. The next prime is 66608903. The reversal of 66608884 is 48880666.

It can be written as a sum of positive squares in only one way, i.e., 33315984 + 33292900 = 5772^2 + 5770^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66608881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8326107 + ... + 8326114.

Almost surely, 2^66608884 is an apocalyptic number.

It is an amenable number.

66608884 is a deficient number, since it is larger than the sum of its proper divisors (49956670).

66608884 is a wasteful number, since it uses less digits than its factorization.

66608884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16652225 (or 16652223 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 66608884 is about 8161.4265909827. The cubic root of 66608884 is about 405.3629505593.

The spelling of 66608884 in words is "sixty-six million, six hundred eight thousand, eight hundred eighty-four".