67668401 has 2 divisors, whose sum is σ = 67668402. Its totient is φ = 67668400.

The previous prime is 67668389. The next prime is 67668407. The reversal of 67668401 is 10486676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67634176 + 34225 = 8224^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 67668401 - 2¹⁰ = 67667377 is a prime.

It is not a weakly prime, because it can be changed into another prime (67668407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33834200 + 33834201.

It is an arithmetic number, because the mean of its divisors is an integer number (33834201).

Almost surely, 2^67668401 is an apocalyptic number.

It is an amenable number.

67668401 is a deficient number, since it is larger than the sum of its proper divisors (1).

67668401 is an equidigital number, since it uses as much as digits as its factorization.

67668401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 67668401 is about 8226.0805369264. The cubic root of 67668401 is about 407.5009617702.

The spelling of 67668401 in words is "sixty-seven million, six hundred sixty-eight thousand, four hundred one".