670777 has 2 divisors, whose sum is σ = 670778. Its totient is φ = 670776.

The previous prime is 670763. The next prime is 670781. The reversal of 670777 is 777076.

670777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670761 + 16 = 819^2 + 4^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670777 is a prime.

It is not a weakly prime, because it can be changed into another prime (670727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335388 + 335389.

It is an arithmetic number, because the mean of its divisors is an integer number (335389).

2⁶⁷⁰⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

670777 is a deficient number, since it is larger than the sum of its proper divisors (1).

670777 is an equidigital number, since it uses as much as digits as its factorization.

670777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 670777 is about 819.0097679515. The cubic root of 670777 is about 87.5372141024.

The spelling of 670777 in words is "six hundred seventy thousand, seven hundred seventy-seven".