6778061 has 2 divisors, whose sum is σ = 6778062. Its totient is φ = 6778060.

The previous prime is 6778049. The next prime is 6778063. The reversal of 6778061 is 1608776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 372100 = 2531^2 + 610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6778061 is a prime.

It is a super-2 number, since 2×6778061² = 91884221839442, which contains 22 as substring.

Together with 6778063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389030 + 3389031.

It is an arithmetic number, because the mean of its divisors is an integer number (3389031).

Almost surely, 2^6778061 is an apocalyptic number.

It is an amenable number.

6778061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778061 is an equidigital number, since it uses as much as digits as its factorization.

6778061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 6778061 is about 2603.4709524018. The cubic root of 6778061 is about 189.2496816730.

The spelling of 6778061 in words is "six million, seven hundred seventy-eight thousand, sixty-one".