6468557 has 4 divisors (see below), whose sum is σ = 6509916. Its totient is φ = 6427200.

The previous prime is 6468541. The next prime is 6468559. The reversal of 6468557 is 7558646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3798601 + 2669956 = 1949^2 + 1634^2 .

It is a cyclic number.

It is not a de Polignac number, because 6468557 - 2⁴ = 6468541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6468559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20444 + ... + 20757.

It is an arithmetic number, because the mean of its divisors is an integer number (1627479).

Almost surely, 2^6468557 is an apocalyptic number.

It is an amenable number.

6468557 is a deficient number, since it is larger than the sum of its proper divisors (41359).

6468557 is a wasteful number, since it uses less digits than its factorization.

6468557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41358.

The product of its digits is 201600, while the sum is 41.

The square root of 6468557 is about 2543.3358016589. The cubic root of 6468557 is about 186.3241447660.

The spelling of 6468557 in words is "six million, four hundred sixty-eight thousand, five hundred fifty-seven".