6603998 has 4 divisors (see below), whose sum is σ = 9906000. Its totient is φ = 3301998.

The previous prime is 6603997. The next prime is 6604009. The reversal of 6603998 is 8993066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8993066 = 2 ⋅4496533.

It is a super-2 number, since 2×6603998² = 87225579168008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6603991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650998 + ... + 1651001.

It is an arithmetic number, because the mean of its divisors is an integer number (2476500).

Almost surely, 2^6603998 is an apocalyptic number.

6603998 is a deficient number, since it is larger than the sum of its proper divisors (3302002).

6603998 is a wasteful number, since it uses less digits than its factorization.

6603998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302001.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 6603998 is about 2569.8245076269. The cubic root of 6603998 is about 187.6156134383.

The spelling of 6603998 in words is "six million, six hundred three thousand, nine hundred ninety-eight".