4578886666 has 4 divisors (see below), whose sum is σ = 6868330002. Its totient is φ = 2289443332.

The previous prime is 4578886619. The next prime is 4578886693. The reversal of 4578886666 is 6666888754.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2924105625 + 1654781041 = 54075^2 + 40679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4578886598 and 4578886607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144721665 + ... + 1144721668.

Almost surely, 2^4578886666 is an apocalyptic number.

4578886666 is a deficient number, since it is larger than the sum of its proper divisors (2289443336).

4578886666 is a wasteful number, since it uses less digits than its factorization.

4578886666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289443335.

The product of its digits is 92897280, while the sum is 64.

The square root of 4578886666 is about 67667.4712546582. The cubic root of 4578886666 is about 1660.5551278799. Note that the first 3 decimals are identical.

The spelling of 4578886666 in words is "four billion, five hundred seventy-eight million, eight hundred eighty-six thousand, six hundred sixty-six".