66880808 has 16 divisors (see below), whose sum is σ = 125488500. Its totient is φ = 33417216.

The previous prime is 66880739. The next prime is 66880811. The reversal of 66880808 is 80808866.

66880808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53027524 + 13853284 = 7282^2 + 3722^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19958 + ... + 23066.

Almost surely, 2^66880808 is an apocalyptic number.

It is an amenable number.

66880808 is a deficient number, since it is larger than the sum of its proper divisors (58607692).

66880808 is a wasteful number, since it uses less digits than its factorization.

66880808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5804 (or 5800 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 66880808 is about 8178.0687206699. The cubic root of 66880808 is about 405.9138193000.

The spelling of 66880808 in words is "sixty-six million, eight hundred eighty thousand, eight hundred eight".