6644998 has 8 divisors (see below), whose sum is σ = 9983520. Its totient is φ = 3317160.

The previous prime is 6644983. The next prime is 6645013. The reversal of 6644998 is 8994466.

It is an interprime number because it is at equal distance from previous prime (6644983) and next prime (6645013).

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

It is an Ulam number.

It is a congruent number.

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, 873 + ... + 3748.

It is an arithmetic number, because the mean of its divisors is an integer number (1247940).

Almost surely, 2^6644998 is an apocalyptic number.

6644998 is a deficient number, since it is larger than the sum of its proper divisors (3338522).

6644998 is a wasteful number, since it uses less digits than its factorization.

6644998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342.

The product of its digits is 373248, while the sum is 46.

The square root of 6644998 is about 2577.7893630008. The cubic root of 6644998 is about 188.0030744933.

The spelling of 6644998 in words is "six million, six hundred forty-four thousand, nine hundred ninety-eight".