6166681 has 2 divisors, whose sum is σ = 6166682. Its totient is φ = 6166680.

The previous prime is 6166669. The next prime is 6166703. The reversal of 6166681 is 1866616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3222025 + 2944656 = 1795^2 + 1716^2 .

It is a cyclic number.

It is not a de Polignac number, because 6166681 - 2⁹ = 6166169 is a prime.

It is a super-2 number, since 2×6166681² = 76055909111522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6166081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3083340 + 3083341.

It is an arithmetic number, because the mean of its divisors is an integer number (3083341).

Almost surely, 2^6166681 is an apocalyptic number.

It is an amenable number.

6166681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6166681 is an equidigital number, since it uses as much as digits as its factorization.

6166681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 6166681 is about 2483.2802902613. The cubic root of 6166681 is about 183.3793775994.

The spelling of 6166681 in words is "six million, one hundred sixty-six thousand, six hundred eighty-one".