60661 has 2 divisors, whose sum is σ = 60662. Its totient is φ = 60660.

The previous prime is 60659. The next prime is 60679. The reversal of 60661 is 16606.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42436 + 18225 = 206^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 60661 - 2¹ = 60659 is a prime.

Together with 60659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330 + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (30331).

2⁶⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

60661 is a deficient number, since it is larger than the sum of its proper divisors (1).

60661 is an equidigital number, since it uses as much as digits as its factorization.

60661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 60661 is about 246.2945391193. The cubic root of 60661 is about 39.2919143304.

The spelling of 60661 in words is "sixty thousand, six hundred sixty-one".