6545657 has 4 divisors (see below), whose sum is σ = 6613236. Its totient is φ = 6478080.

The previous prime is 6545653. The next prime is 6545687. The reversal of 6545657 is 7565456.

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 5067001 + 1478656 = 2251^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 6545657 - 2² = 6545653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6545657.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545653) 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, 33644 + ... + 33837.

It is an arithmetic number, because the mean of its divisors is an integer number (1653309).

Almost surely, 2^6545657 is an apocalyptic number.

It is an amenable number.

6545657 is a deficient number, since it is larger than the sum of its proper divisors (67579).

6545657 is an equidigital number, since it uses as much as digits as its factorization.

6545657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67578.

The product of its digits is 126000, while the sum is 38.

The square root of 6545657 is about 2558.4481624610. The cubic root of 6545657 is about 187.0615009281.

The spelling of 6545657 in words is "six million, five hundred forty-five thousand, six hundred fifty-seven".