670668811 has 2 divisors, whose sum is σ = 670668812. Its totient is φ = 670668810.

The previous prime is 670668797. The next prime is 670668829. The reversal of 670668811 is 118866076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670668811 - 2¹⁹ = 670144523 is a prime.

It is not a weakly prime, because it can be changed into another prime (670668851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335334405 + 335334406.

It is an arithmetic number, because the mean of its divisors is an integer number (335334406).

Almost surely, 2^670668811 is an apocalyptic number.

670668811 is a deficient number, since it is larger than the sum of its proper divisors (1).

670668811 is an equidigital number, since it uses as much as digits as its factorization.

670668811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 670668811 is about 25897.2742001933. The cubic root of 670668811 is about 875.3250758403.

The spelling of 670668811 in words is "six hundred seventy million, six hundred sixty-eight thousand, eight hundred eleven".