6691771 has 2 divisors, whose sum is σ = 6691772. Its totient is φ = 6691770.

The previous prime is 6691723. The next prime is 6691777. The reversal of 6691771 is 1771966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6691771 - 2⁹ = 6691259 is a prime.

It is a super-3 number, since 3×6691771³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6691771.

It is not a weakly prime, because it can be changed into another prime (6691777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345885 + 3345886.

It is an arithmetic number, because the mean of its divisors is an integer number (3345886).

Almost surely, 2^6691771 is an apocalyptic number.

6691771 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691771 is an equidigital number, since it uses as much as digits as its factorization.

6691771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 37.

The square root of 6691771 is about 2586.8457627002. The cubic root of 6691771 is about 188.4431506831.

The spelling of 6691771 in words is "six million, six hundred ninety-one thousand, seven hundred seventy-one".