66866248 has 32 divisors (see below), whose sum is σ = 129243960. Its totient is φ = 32417280.

The previous prime is 66866243. The next prime is 66866249. The reversal of 66866248 is 84266866.

66866248 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 4 ways, for example, as 45724644 + 21141604 = 6762^2 + 4598^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66866198 and 66866207.

It is not an unprimeable number, because it can be changed into a prime (66866243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 34686 + ... + 36562.

Almost surely, 2^66866248 is an apocalyptic number.

It is an amenable number.

66866248 is a deficient number, since it is larger than the sum of its proper divisors (62377712).

66866248 is a wasteful number, since it uses less digits than its factorization.

66866248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2013 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The square root of 66866248 is about 8177.1784864952. The cubic root of 66866248 is about 405.8843612521.

The spelling of 66866248 in words is "sixty-six million, eight hundred sixty-six thousand, two hundred forty-eight".