502116661 has 2 divisors, whose sum is σ = 502116662. Its totient is φ = 502116660.

The previous prime is 502116649. The next prime is 502116673. The reversal of 502116661 is 166611205.

It is a balanced prime because it is at equal distance from previous prime (502116649) and next prime (502116673).

It can be written as a sum of positive squares in only one way, i.e., 347114161 + 155002500 = 18631^2 + 12450^2 .

It is a cyclic number.

It is not a de Polignac number, because 502116661 - 2⁷ = 502116533 is a prime.

It is a super-2 number, since 2×502116661² = 504242282507577842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502114661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251058330 + 251058331.

It is an arithmetic number, because the mean of its divisors is an integer number (251058331).

Almost surely, 2^502116661 is an apocalyptic number.

It is an amenable number.

502116661 is a deficient number, since it is larger than the sum of its proper divisors (1).

502116661 is an equidigital number, since it uses as much as digits as its factorization.

502116661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 502116661 is about 22407.9597687964. The cubic root of 502116661 is about 794.8189458878.

Adding to 502116661 its reverse (166611205), we get a palindrome (668727866).

The spelling of 502116661 in words is "five hundred two million, one hundred sixteen thousand, six hundred sixty-one".