68265661 has 2 divisors, whose sum is σ = 68265662. Its totient is φ = 68265660.

The previous prime is 68265653. The next prime is 68265677. The reversal of 68265661 is 16656286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61136761 + 7128900 = 7819^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 68265661 - 2³ = 68265653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68265601) 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, 34132830 + 34132831.

It is an arithmetic number, because the mean of its divisors is an integer number (34132831).

Almost surely, 2^68265661 is an apocalyptic number.

It is an amenable number.

68265661 is a deficient number, since it is larger than the sum of its proper divisors (1).

68265661 is an equidigital number, since it uses as much as digits as its factorization.

68265661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 68265661 is about 8262.3036133998. The cubic root of 68265661 is about 408.6963570275.

The spelling of 68265661 in words is "sixty-eight million, two hundred sixty-five thousand, six hundred sixty-one".