6698645 has 4 divisors (see below), whose sum is σ = 8038380. Its totient is φ = 5358912.

The previous prime is 6698633. The next prime is 6698651. The reversal of 6698645 is 5468966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 5726449 = 986^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 6698645 - 2⁸ = 6698389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6698596 and 6698605.

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, 669860 + ... + 669869.

It is an arithmetic number, because the mean of its divisors is an integer number (2009595).

Almost surely, 2^6698645 is an apocalyptic number.

It is an amenable number.

6698645 is a deficient number, since it is larger than the sum of its proper divisors (1339735).

6698645 is a wasteful number, since it uses less digits than its factorization.

6698645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339734.

The product of its digits is 311040, while the sum is 44.

The square root of 6698645 is about 2588.1740667892. The cubic root of 6698645 is about 188.5076535342.

The spelling of 6698645 in words is "six million, six hundred ninety-eight thousand, six hundred forty-five".