6681377 has 2 divisors, whose sum is σ = 6681378. Its totient is φ = 6681376.

The previous prime is 6681361. The next prime is 6681403. The reversal of 6681377 is 7731866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 2835856 = 1961^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 6681377 - 2⁴ = 6681361 is a prime.

It is a super-2 number, since 2×6681377² = 89281597232258, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6681377.

It is not a weakly prime, because it can be changed into another prime (6681677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340688 + 3340689.

It is an arithmetic number, because the mean of its divisors is an integer number (3340689).

Almost surely, 2^6681377 is an apocalyptic number.

It is an amenable number.

6681377 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681377 is an equidigital number, since it uses as much as digits as its factorization.

6681377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 6681377 is about 2584.8359715850. The cubic root of 6681377 is about 188.3455336202.

The spelling of 6681377 in words is "six million, six hundred eighty-one thousand, three hundred seventy-seven".