706661000561 has 4 divisors (see below), whose sum is σ = 731028621300. Its totient is φ = 682293379824.

The previous prime is 706661000531. The next prime is 706661000599. The reversal of 706661000561 is 165000166607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 556748776336 + 149912224225 = 746156^2 + 387185^2 .

It is a cyclic number.

It is not a de Polignac number, because 706661000561 - 2¹⁴ = 706660984177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706661000531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12183810326 + ... + 12183810383.

It is an arithmetic number, because the mean of its divisors is an integer number (182757155325).

Almost surely, 2^706661000561 is an apocalyptic number.

It is an amenable number.

706661000561 is a deficient number, since it is larger than the sum of its proper divisors (24367620739).

706661000561 is a wasteful number, since it uses less digits than its factorization.

706661000561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24367620738.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 706661000561 in words is "seven hundred six billion, six hundred sixty-one million, five hundred sixty-one", and thus it is an aban number.