567742661 has 2 divisors, whose sum is σ = 567742662. Its totient is φ = 567742660.

The previous prime is 567742633. The next prime is 567742687. The reversal of 567742661 is 166247765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449694436 + 118048225 = 21206^2 + 10865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-567742661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (567742691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283871330 + 283871331.

It is an arithmetic number, because the mean of its divisors is an integer number (283871331).

Almost surely, 2^567742661 is an apocalyptic number.

It is an amenable number.

567742661 is a deficient number, since it is larger than the sum of its proper divisors (1).

567742661 is an equidigital number, since it uses as much as digits as its factorization.

567742661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 567742661 is about 23827.3511116951. The cubic root of 567742661 is about 828.0384612853.

The spelling of 567742661 in words is "five hundred sixty-seven million, seven hundred forty-two thousand, six hundred sixty-one".