68548661 has 2 divisors, whose sum is σ = 68548662. Its totient is φ = 68548660.

The previous prime is 68548651. The next prime is 68548691. The reversal of 68548661 is 16684586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 15171025 = 7306^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 68548661 - 2¹⁰ = 68547637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68548651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34274330 + 34274331.

It is an arithmetic number, because the mean of its divisors is an integer number (34274331).

Almost surely, 2^68548661 is an apocalyptic number.

It is an amenable number.

68548661 is a deficient number, since it is larger than the sum of its proper divisors (1).

68548661 is an equidigital number, since it uses as much as digits as its factorization.

68548661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 68548661 is about 8279.4118752481. The cubic root of 68548661 is about 409.2603380367.

The spelling of 68548661 in words is "sixty-eight million, five hundred forty-eight thousand, six hundred sixty-one".