6644798 has 4 divisors (see below), whose sum is σ = 9967200. Its totient is φ = 3322398.

The previous prime is 6644783. The next prime is 6644801. The reversal of 6644798 is 8974466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8974466 = 2 ⋅4487233.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661198 + ... + 1661201.

It is an arithmetic number, because the mean of its divisors is an integer number (2491800).

Almost surely, 2^6644798 is an apocalyptic number.

6644798 is a deficient number, since it is larger than the sum of its proper divisors (3322402).

6644798 is a wasteful number, since it uses less digits than its factorization.

6644798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322401.

The product of its digits is 290304, while the sum is 44.

The square root of 6644798 is about 2577.7505697798. The cubic root of 6644798 is about 188.0011883130.

The spelling of 6644798 in words is "six million, six hundred forty-four thousand, seven hundred ninety-eight".