67778063 has 2 divisors, whose sum is σ = 67778064. Its totient is φ = 67778062.

The previous prime is 67778041. The next prime is 67778077. The reversal of 67778063 is 36087776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67778063 - 2¹⁶ = 67712527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67778003) 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, 33889031 + 33889032.

It is an arithmetic number, because the mean of its divisors is an integer number (33889032).

Almost surely, 2^67778063 is an apocalyptic number.

67778063 is a deficient number, since it is larger than the sum of its proper divisors (1).

67778063 is an equidigital number, since it uses as much as digits as its factorization.

67778063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 67778063 is about 8232.7433459328. The cubic root of 67778063 is about 407.7209721528.

The spelling of 67778063 in words is "sixty-seven million, seven hundred seventy-eight thousand, sixty-three".