646534067 has 2 divisors, whose sum is σ = 646534068. Its totient is φ = 646534066.

The previous prime is 646534051. The next prime is 646534069. The reversal of 646534067 is 760435646.

646534067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646534067 - 2⁴ = 646534051 is a prime.

Together with 646534069, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646534069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323267033 + 323267034.

It is an arithmetic number, because the mean of its divisors is an integer number (323267034).

Almost surely, 2^646534067 is an apocalyptic number.

646534067 is a deficient number, since it is larger than the sum of its proper divisors (1).

646534067 is an equidigital number, since it uses as much as digits as its factorization.

646534067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 646534067 is about 25427.0341762464. The cubic root of 646534067 is about 864.6967059021.

The spelling of 646534067 in words is "six hundred forty-six million, five hundred thirty-four thousand, sixty-seven".