646107067 has 2 divisors, whose sum is σ = 646107068. Its totient is φ = 646107066.

The previous prime is 646107017. The next prime is 646107107. The reversal of 646107067 is 760701646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646107067 - 2⁷ = 646106939 is a prime.

It is not a weakly prime, because it can be changed into another prime (646107017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323053533 + 323053534.

It is an arithmetic number, because the mean of its divisors is an integer number (323053534).

Almost surely, 2^646107067 is an apocalyptic number.

646107067 is a deficient number, since it is larger than the sum of its proper divisors (1).

646107067 is an equidigital number, since it uses as much as digits as its factorization.

646107067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 646107067 is about 25418.6362143999. The cubic root of 646107067 is about 864.5063025259.

The spelling of 646107067 in words is "six hundred forty-six million, one hundred seven thousand, sixty-seven".