6543657 has 24 divisors (see below), whose sum is σ = 10539360. Its totient is φ = 3888000.

The previous prime is 6543643. The next prime is 6543659. The reversal of 6543657 is 7563456.

It is not a de Polignac number, because 6543657 - 2¹⁰ = 6542633 is a prime.

6543657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6543659) 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, 1782 + ... + 4032.

It is an arithmetic number, because the mean of its divisors is an integer number (439140).

Almost surely, 2^6543657 is an apocalyptic number.

It is an amenable number.

6543657 is a deficient number, since it is larger than the sum of its proper divisors (3995703).

6543657 is a wasteful number, since it uses less digits than its factorization.

6543657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293 (or 2290 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 6543657 is about 2558.0572706646. The cubic root of 6543657 is about 187.0424470163.

The spelling of 6543657 in words is "six million, five hundred forty-three thousand, six hundred fifty-seven".