6689741 has 2 divisors, whose sum is σ = 6689742. Its totient is φ = 6689740.

The previous prime is 6689723. The next prime is 6689773. The reversal of 6689741 is 1479866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6002500 + 687241 = 2450^2 + 829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6689741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6689701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344870 + 3344871.

It is an arithmetic number, because the mean of its divisors is an integer number (3344871).

Almost surely, 2^6689741 is an apocalyptic number.

It is an amenable number.

6689741 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689741 is an equidigital number, since it uses as much as digits as its factorization.

6689741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 6689741 is about 2586.4533631983. The cubic root of 6689741 is about 188.4240935314.

The spelling of 6689741 in words is "six million, six hundred eighty-nine thousand, seven hundred forty-one".