6541655 has 4 divisors (see below), whose sum is σ = 7849992. Its totient is φ = 5233320.

The previous prime is 6541621. The next prime is 6541663. The reversal of 6541655 is 5561456.

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

It is a de Polignac number, because none of the positive numbers 2^k-6541655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 654161 + ... + 654170.

It is an arithmetic number, because the mean of its divisors is an integer number (1962498).

Almost surely, 2^6541655 is an apocalyptic number.

6541655 is a deficient number, since it is larger than the sum of its proper divisors (1308337).

6541655 is a wasteful number, since it uses less digits than its factorization.

6541655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308336.

The product of its digits is 18000, while the sum is 32.

The square root of 6541655 is about 2557.6659281462. The cubic root of 6541655 is about 187.0233701620.

The spelling of 6541655 in words is "six million, five hundred forty-one thousand, six hundred fifty-five".