1777 is nontrivially palindromic in base 6 and base 15.
1777 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1777 is a prime.
It is a Chen prime.
1777 is an undulating number in base 6 and base 15.
1777 is a lucky number.
It is a plaindrome in base 10.
21777 is an apocalyptic number.
It is an amenable number.
1777 is an equidigital number, since it uses as much as digits as its factorization.
1777 is an odious number, because the sum of its binary digits is odd.
The square root of 1777 is about 42.1544778167. The cubic root of 1777 is about 12.1123703828.
The spelling of 1777 in words is "one thousand, seven hundred seventy-seven", and thus it is an iban number.