68376661 has 2 divisors, whose sum is σ = 68376662. Its totient is φ = 68376660.

The previous prime is 68376613. The next prime is 68376719. The reversal of 68376661 is 16667386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 3976036 = 8025^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 68376661 - 2¹⁷ = 68245589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68376961) 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, 34188330 + 34188331.

It is an arithmetic number, because the mean of its divisors is an integer number (34188331).

Almost surely, 2^68376661 is an apocalyptic number.

It is an amenable number.

68376661 is a deficient number, since it is larger than the sum of its proper divisors (1).

68376661 is an equidigital number, since it uses as much as digits as its factorization.

68376661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 68376661 is about 8269.0181400212. The cubic root of 68376661 is about 408.9177505713.

The spelling of 68376661 in words is "sixty-eight million, three hundred seventy-six thousand, six hundred sixty-one".