67945663 has 2 divisors, whose sum is σ = 67945664. Its totient is φ = 67945662.

The previous prime is 67945649. The next prime is 67945667. The reversal of 67945663 is 36654976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67945663 - 2²¹ = 65848511 is a prime.

It is a super-2 number, since 2×67945663² = 9233226241019138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67945667) 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, 33972831 + 33972832.

It is an arithmetic number, because the mean of its divisors is an integer number (33972832).

Almost surely, 2^67945663 is an apocalyptic number.

67945663 is a deficient number, since it is larger than the sum of its proper divisors (1).

67945663 is an equidigital number, since it uses as much as digits as its factorization.

67945663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 46.

The square root of 67945663 is about 8242.9159282380. The cubic root of 67945663 is about 408.0567631360.

The spelling of 67945663 in words is "sixty-seven million, nine hundred forty-five thousand, six hundred sixty-three".