646559067 has 24 divisors (see below), whose sum is σ = 1093995072. Its totient is φ = 335874000.

The previous prime is 646559041. The next prime is 646559083. The reversal of 646559067 is 760955646.

It is not a de Polignac number, because 646559067 - 2⁸ = 646558811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646559027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198309 + ... + 201542.

It is an arithmetic number, because the mean of its divisors is an integer number (45583128).

Almost surely, 2^646559067 is an apocalyptic number.

646559067 is a deficient number, since it is larger than the sum of its proper divisors (447436005).

646559067 is a wasteful number, since it uses less digits than its factorization.

646559067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399879 (or 399872 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 48.

The square root of 646559067 is about 25427.5257742471. The cubic root of 646559067 is about 864.7078510426.

The spelling of 646559067 in words is "six hundred forty-six million, five hundred fifty-nine thousand, sixty-seven".