576787661 has 2 divisors, whose sum is σ = 576787662. Its totient is φ = 576787660.

The previous prime is 576787649. The next prime is 576787727. The reversal of 576787661 is 166787675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552532036 + 24255625 = 23506^2 + 4925^2 .

It is a cyclic number.

It is not a de Polignac number, because 576787661 - 2²⁶ = 509678797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (576087661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288393830 + 288393831.

It is an arithmetic number, because the mean of its divisors is an integer number (288393831).

Almost surely, 2^576787661 is an apocalyptic number.

It is an amenable number.

576787661 is a deficient number, since it is larger than the sum of its proper divisors (1).

576787661 is an equidigital number, since it uses as much as digits as its factorization.

576787661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 576787661 is about 24016.4039981010. The cubic root of 576787661 is about 832.4126159456.

The spelling of 576787661 in words is "five hundred seventy-six million, seven hundred eighty-seven thousand, six hundred sixty-one".