6694663 has 2 divisors, whose sum is σ = 6694664. Its totient is φ = 6694662.

The previous prime is 6694643. The next prime is 6694673. The reversal of 6694663 is 3664966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6694663 - 2¹⁷ = 6563591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6694643) 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, 3347331 + 3347332.

It is an arithmetic number, because the mean of its divisors is an integer number (3347332).

Almost surely, 2^6694663 is an apocalyptic number.

6694663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6694663 is an equidigital number, since it uses as much as digits as its factorization.

6694663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 6694663 is about 2587.4046842348. The cubic root of 6694663 is about 188.4702934281.

The spelling of 6694663 in words is "six million, six hundred ninety-four thousand, six hundred sixty-three".