4238399666 has 4 divisors (see below), whose sum is σ = 6357599502. Its totient is φ = 2119199832.

The previous prime is 4238399629. The next prime is 4238399687. The reversal of 4238399666 is 6669938324.

4238399666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 3946980625 + 291419041 = 62825^2 + 17071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059599915 + ... + 1059599918.

Almost surely, 2^4238399666 is an apocalyptic number.

4238399666 is a deficient number, since it is larger than the sum of its proper divisors (2119199836).

4238399666 is a wasteful number, since it uses less digits than its factorization.

4238399666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119199835.

The product of its digits is 10077696, while the sum is 56.

The square root of 4238399666 is about 65102.9927576298. The cubic root of 4238399666 is about 1618.3308095481.

The spelling of 4238399666 in words is "four billion, two hundred thirty-eight million, three hundred ninety-nine thousand, six hundred sixty-six".