6866149 has 2 divisors, whose sum is σ = 6866150. Its totient is φ = 6866148.

The previous prime is 6866143. The next prime is 6866173. The reversal of 6866149 is 9416686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5062500 + 1803649 = 2250^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 6866149 - 2⁷ = 6866021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6866143) 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, 3433074 + 3433075.

It is an arithmetic number, because the mean of its divisors is an integer number (3433075).

Almost surely, 2^6866149 is an apocalyptic number.

It is an amenable number.

6866149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866149 is an equidigital number, since it uses as much as digits as its factorization.

6866149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 6866149 is about 2620.3337573676. Note that the first 3 decimals coincide. The cubic root of 6866149 is about 190.0659881596.

The spelling of 6866149 in words is "six million, eight hundred sixty-six thousand, one hundred forty-nine".