60505661 has 2 divisors, whose sum is σ = 60505662. Its totient is φ = 60505660.

The previous prime is 60505651. The next prime is 60505691. The reversal of 60505661 is 16650506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47183161 + 13322500 = 6869^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 60505661 - 2⁶ = 60505597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60505631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30252830 + 30252831.

It is an arithmetic number, because the mean of its divisors is an integer number (30252831).

Almost surely, 2^60505661 is an apocalyptic number.

It is an amenable number.

60505661 is a deficient number, since it is larger than the sum of its proper divisors (1).

60505661 is an equidigital number, since it uses as much as digits as its factorization.

60505661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 60505661 is about 7778.5384874024. The cubic root of 60505661 is about 392.5834644739.

It can be divided in two parts, 6050 and 5661, that added together give a palindrome (11711).

The spelling of 60505661 in words is "sixty million, five hundred five thousand, six hundred sixty-one".