6557197 has 4 divisors (see below), whose sum is σ = 6564160. Its totient is φ = 6550236.

The previous prime is 6557191. The next prime is 6557203. The reversal of 6557197 is 7917556.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (6557191) and next prime (6557203).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6557197 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 (6557191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1797 + ... + 4042.

It is an arithmetic number, because the mean of its divisors is an integer number (1641040).

Almost surely, 2^6557197 is an apocalyptic number.

It is an amenable number.

6557197 is a deficient number, since it is larger than the sum of its proper divisors (6963).

6557197 is a wasteful number, since it uses less digits than its factorization.

6557197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962.

The product of its digits is 66150, while the sum is 40.

The square root of 6557197 is about 2560.7024426903. The cubic root of 6557197 is about 187.1713662617.

The spelling of 6557197 in words is "six million, five hundred fifty-seven thousand, one hundred ninety-seven".