6695981 has 2 divisors, whose sum is σ = 6695982. Its totient is φ = 6695980.

The previous prime is 6695959. The next prime is 6695987. The reversal of 6695981 is 1895966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6375625 + 320356 = 2525^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 6695981 - 2²² = 2501677 is a prime.

It is a super-2 number, since 2×6695981² = 89672323104722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6695987) 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 as a sum of consecutive naturals, namely, 3347990 + 3347991.

It is an arithmetic number, because the mean of its divisors is an integer number (3347991).

Almost surely, 2^6695981 is an apocalyptic number.

It is an amenable number.

6695981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6695981 is an equidigital number, since it uses as much as digits as its factorization.

6695981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 6695981 is about 2587.6593670729. The cubic root of 6695981 is about 188.4826608690.

The spelling of 6695981 in words is "six million, six hundred ninety-five thousand, nine hundred eighty-one".