5998438666 has 8 divisors (see below), whose sum is σ = 9815626944. Its totient is φ = 2726563020.

The previous prime is 5998438603. The next prime is 5998438679. The reversal of 5998438666 is 6668348995.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 5998438598 and 5998438607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136328130 + ... + 136328173.

It is an arithmetic number, because the mean of its divisors is an integer number (1226953368).

Almost surely, 2^5998438666 is an apocalyptic number.

5998438666 is a deficient number, since it is larger than the sum of its proper divisors (3817188278).

5998438666 is a wasteful number, since it uses less digits than its factorization.

5998438666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272656316.

The product of its digits is 67184640, while the sum is 64.

The square root of 5998438666 is about 77449.5879007758. The cubic root of 5998438666 is about 1816.9629607047.

The spelling of 5998438666 in words is "five billion, nine hundred ninety-eight million, four hundred thirty-eight thousand, six hundred sixty-six".