3568998661 has 2 divisors, whose sum is σ = 3568998662. Its totient is φ = 3568998660.

The previous prime is 3568998623. The next prime is 3568998731. The reversal of 3568998661 is 1668998653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3540845025 + 28153636 = 59505^2 + 5306^2 .

It is a cyclic number.

It is not a de Polignac number, because 3568998661 - 2⁹ = 3568998149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3568998661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3568998761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1784499330 + 1784499331.

It is an arithmetic number, because the mean of its divisors is an integer number (1784499331).

Almost surely, 2^3568998661 is an apocalyptic number.

It is an amenable number.

3568998661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3568998661 is an equidigital number, since it uses as much as digits as its factorization.

3568998661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 61.

The square root of 3568998661 is about 59741.0969182857. The cubic root of 3568998661 is about 1528.2068018494.

The spelling of 3568998661 in words is "three billion, five hundred sixty-eight million, nine hundred ninety-eight thousand, six hundred sixty-one".