5998666 has 4 divisors (see below), whose sum is σ = 8998002. Its totient is φ = 2999332.

The previous prime is 5998651. The next prime is 5998667. The reversal of 5998666 is 6668995.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6668995 = 5 ⋅1333799.

It can be written as a sum of positive squares in only one way, i.e., 4968441 + 1030225 = 2229^2 + 1015^2 .

It is not an unprimeable number, because it can be changed into a prime (5998667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1499665 + ... + 1499668.

Almost surely, 2^5998666 is an apocalyptic number.

5998666 is a deficient number, since it is larger than the sum of its proper divisors (2999336).

5998666 is a wasteful number, since it uses less digits than its factorization.

5998666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999335.

The product of its digits is 699840, while the sum is 49.

The square root of 5998666 is about 2449.2174260363. The cubic root of 5998666 is about 181.6985914024.

The spelling of 5998666 in words is "five million, nine hundred ninety-eight thousand, six hundred sixty-six".