6811657 has 4 divisors (see below), whose sum is σ = 7107840. Its totient is φ = 6515476.

The previous prime is 6811639. The next prime is 6811667. The reversal of 6811657 is 7561186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6811657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6811627) by changing a digit.

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, 148057 + ... + 148102.

It is an arithmetic number, because the mean of its divisors is an integer number (1776960).

Almost surely, 2^6811657 is an apocalyptic number.

It is an amenable number.

6811657 is a deficient number, since it is larger than the sum of its proper divisors (296183).

6811657 is a wasteful number, since it uses less digits than its factorization.

6811657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296182.

The product of its digits is 10080, while the sum is 34.

The square root of 6811657 is about 2609.9151327198. The cubic root of 6811657 is about 189.5618435355.

The spelling of 6811657 in words is "six million, eight hundred eleven thousand, six hundred fifty-seven".