68425661 has 2 divisors, whose sum is σ = 68425662. Its totient is φ = 68425660.

The previous prime is 68425657. The next prime is 68425699. The reversal of 68425661 is 16652486.

It is an a-pointer prime, because the next prime (68425699) can be obtained adding 68425661 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 32761 = 8270^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 68425661 - 2² = 68425657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68424661) 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, 34212830 + 34212831.

It is an arithmetic number, because the mean of its divisors is an integer number (34212831).

Almost surely, 2^68425661 is an apocalyptic number.

It is an amenable number.

68425661 is a deficient number, since it is larger than the sum of its proper divisors (1).

68425661 is an equidigital number, since it uses as much as digits as its factorization.

68425661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 68425661 is about 8271.9804762826. The cubic root of 68425661 is about 409.0154066287.

The spelling of 68425661 in words is "sixty-eight million, four hundred twenty-five thousand, six hundred sixty-one".