706661 has 2 divisors, whose sum is σ = 706662. Its totient is φ = 706660.

The previous prime is 706633. The next prime is 706669. The reversal of 706661 is 166607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 42436 = 815^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 706661 - 2⁶ = 706597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 706661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353330 + 353331.

It is an arithmetic number, because the mean of its divisors is an integer number (353331).

2⁷⁰⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

706661 is a deficient number, since it is larger than the sum of its proper divisors (1).

706661 is an equidigital number, since it uses as much as digits as its factorization.

706661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 706661 is about 840.6313103852. The cubic root of 706661 is about 89.0711462417.

The spelling of 706661 in words is "seven hundred six thousand, six hundred sixty-one".