66608882 has 18 divisors (see below), whose sum is σ = 104000013. Its totient is φ = 31994424.

The previous prime is 66608881. The next prime is 66608903. The reversal of 66608882 is 28880666.

It can be written as a sum of positive squares in 2 ways, for example, as 66569281 + 39601 = 8159^2 + 199^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5771.

It is a super-2 number, since 2×66608882² = 8873486322579848, which contains 22 as substring.

It is a Duffinian 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 in 8 ways as a sum of consecutive naturals, for example, 334619 + ... + 334817.

Almost surely, 2^66608882 is an apocalyptic number.

66608882 is a deficient number, since it is larger than the sum of its proper divisors (37391131).

66608882 is an equidigital number, since it uses as much as digits as its factorization.

66608882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 66608882 is about 8161.4264684551. The cubic root of 66608882 is about 405.3629465021.

The spelling of 66608882 in words is "sixty-six million, six hundred eight thousand, eight hundred eighty-two".