6998644 has 12 divisors (see below), whose sum is σ = 12367264. Its totient is φ = 3465144.

The previous prime is 6998627. The next prime is 6998681. The reversal of 6998644 is 4468996.

It is a d-powerful number, because it can be written as 6 + 9⁶ + 9⁷ + 8³ + 6⁸ + 4 + 4⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 6998594 and 6998603.

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, 8082 + ... + 8905.

Almost surely, 2^6998644 is an apocalyptic number.

It is an amenable number.

6998644 is a deficient number, since it is larger than the sum of its proper divisors (5368620).

6998644 is a wasteful number, since it uses less digits than its factorization.

6998644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094 (or 17092 counting only the distinct ones).

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

The square root of 6998644 is about 2645.4950387404. The cubic root of 6998644 is about 191.2807654096.

The spelling of 6998644 in words is "six million, nine hundred ninety-eight thousand, six hundred forty-four".