61668461 has 2 divisors, whose sum is σ = 61668462. Its totient is φ = 61668460.

The previous prime is 61668449. The next prime is 61668473. The reversal of 61668461 is 16486616.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (61668449) and next prime (61668473).

It can be written as a sum of positive squares in only one way, i.e., 47748100 + 13920361 = 6910^2 + 3731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61668461 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 (61668421) 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, 30834230 + 30834231.

It is an arithmetic number, because the mean of its divisors is an integer number (30834231).

Almost surely, 2^61668461 is an apocalyptic number.

It is an amenable number.

61668461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61668461 is an equidigital number, since it uses as much as digits as its factorization.

61668461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 61668461 is about 7852.9269065744. The cubic root of 61668461 is about 395.0824183090.

The spelling of 61668461 in words is "sixty-one million, six hundred sixty-eight thousand, four hundred sixty-one".