6466385 has 4 divisors (see below), whose sum is σ = 7759668. Its totient is φ = 5173104.

The previous prime is 6466367. The next prime is 6466393. The reversal of 6466385 is 5836646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5836646 = 2 ⋅2918323.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 4804864 = 1289^2 + 2192^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466385 - 2⁸ = 6466129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 646634 + ... + 646643.

It is an arithmetic number, because the mean of its divisors is an integer number (1939917).

Almost surely, 2^6466385 is an apocalyptic number.

It is an amenable number.

6466385 is a deficient number, since it is larger than the sum of its proper divisors (1293283).

6466385 is a wasteful number, since it uses less digits than its factorization.

6466385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293282.

The product of its digits is 103680, while the sum is 38.

The square root of 6466385 is about 2542.9087675337. The cubic root of 6466385 is about 186.3032879069.

The spelling of 6466385 in words is "six million, four hundred sixty-six thousand, three hundred eighty-five".