6691541 has 2 divisors, whose sum is σ = 6691542. Its totient is φ = 6691540.

The previous prime is 6691519. The next prime is 6691577. The reversal of 6691541 is 1451966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4289041 + 2402500 = 2071^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 6691541 - 2¹⁰ = 6690517 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6691498 and 6691507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6691501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345770 + 3345771.

It is an arithmetic number, because the mean of its divisors is an integer number (3345771).

Almost surely, 2^6691541 is an apocalyptic number.

It is an amenable number.

6691541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691541 is an equidigital number, since it uses as much as digits as its factorization.

6691541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 6691541 is about 2586.8013066333. The cubic root of 6691541 is about 188.4409916920.

The spelling of 6691541 in words is "six million, six hundred ninety-one thousand, five hundred forty-one".