6778197 has 6 divisors (see below), whose sum is σ = 9790742. Its totient is φ = 4518792.

The previous prime is 6778183. The next prime is 6778201. The reversal of 6778197 is 7918776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6765201 + 12996 = 2601^2 + 114^2 .

It is not a de Polignac number, because 6778197 - 2¹² = 6774101 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 (6778127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376558 + ... + 376575.

Almost surely, 2^6778197 is an apocalyptic number.

It is an amenable number.

6778197 is a deficient number, since it is larger than the sum of its proper divisors (3012545).

6778197 is a wasteful number, since it uses less digits than its factorization.

6778197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753139 (or 753136 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 6778197 is about 2603.4970712486. The cubic root of 6778197 is about 189.2509474128.

The spelling of 6778197 in words is "six million, seven hundred seventy-eight thousand, one hundred ninety-seven".