6366649 has 2 divisors, whose sum is σ = 6366650. Its totient is φ = 6366648.

The previous prime is 6366643. The next prime is 6366671. The reversal of 6366649 is 9466636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6091024 + 275625 = 2468^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 6366649 - 2⁹ = 6366137 is a prime.

It is not a weakly prime, because it can be changed into another prime (6366643) 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, 3183324 + 3183325.

It is an arithmetic number, because the mean of its divisors is an integer number (3183325).

Almost surely, 2^6366649 is an apocalyptic number.

It is an amenable number.

6366649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6366649 is an equidigital number, since it uses as much as digits as its factorization.

6366649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 6366649 is about 2523.2219482241. The cubic root of 6366649 is about 185.3404881244.

The spelling of 6366649 in words is "six million, three hundred sixty-six thousand, six hundred forty-nine".