510061661 has 2 divisors, whose sum is σ = 510061662. Its totient is φ = 510061660.

The previous prime is 510061627. The next prime is 510061703. The reversal of 510061661 is 166160015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288796036 + 221265625 = 16994^2 + 14875^2 .

It is a cyclic number.

It is not a de Polignac number, because 510061661 - 2⁶ = 510061597 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 510061661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (510063661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255030830 + 255030831.

It is an arithmetic number, because the mean of its divisors is an integer number (255030831).

Almost surely, 2^510061661 is an apocalyptic number.

It is an amenable number.

510061661 is a deficient number, since it is larger than the sum of its proper divisors (1).

510061661 is an equidigital number, since it uses as much as digits as its factorization.

510061661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 510061661 is about 22584.5447374969. The cubic root of 510061661 is about 798.9891717583.

The spelling of 510061661 in words is "five hundred ten million, sixty-one thousand, six hundred sixty-one".