670811 has 2 divisors, whose sum is σ = 670812. Its totient is φ = 670810.

The previous prime is 670781. The next prime is 670823. The reversal of 670811 is 118076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670811 - 2¹⁰ = 669787 is a prime.

It is not a weakly prime, because it can be changed into another prime (670211) 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, 335405 + 335406.

It is an arithmetic number, because the mean of its divisors is an integer number (335406).

2⁶⁷⁰⁸¹¹ is an apocalyptic number.

670811 is a deficient number, since it is larger than the sum of its proper divisors (1).

670811 is an equidigital number, since it uses as much as digits as its factorization.

670811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 670811 is about 819.0305244617. The cubic root of 670811 is about 87.5386930912.

Adding to 670811 its reverse (118076), we get a palindrome (788887).

The spelling of 670811 in words is "six hundred seventy thousand, eight hundred eleven".