6466939389 has 48 divisors (see below), whose sum is σ = 10095321600. Its totient is φ = 3975782400.

The previous prime is 6466939373. The next prime is 6466939393. The reversal of 6466939389 is 9839396646.

6466939389 is a `hidden beast` number, since 6 + 466 + 9 + 3 + 93 + 89 = 666.

It is not a de Polignac number, because 6466939389 - 2⁴ = 6466939373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466939399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4493332 + ... + 4494770.

It is an arithmetic number, because the mean of its divisors is an integer number (210319200).

Almost surely, 2^6466939389 is an apocalyptic number.

It is an amenable number.

6466939389 is a deficient number, since it is larger than the sum of its proper divisors (3628382211).

6466939389 is a wasteful number, since it uses less digits than its factorization.

6466939389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 2143 counting only the distinct ones).

The product of its digits is 45349632, while the sum is 63.

The square root of 6466939389 is about 80417.2828998842. The cubic root of 6466939389 is about 1863.0861192960.

The spelling of 6466939389 in words is "six billion, four hundred sixty-six million, nine hundred thirty-nine thousand, three hundred eighty-nine".