67229681 has 2 divisors, whose sum is σ = 67229682. Its totient is φ = 67229680.

The previous prime is 67229651. The next prime is 67229699. The reversal of 67229681 is 18692276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46799281 + 20430400 = 6841^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 67229681 - 2²⁶ = 120817 is a prime.

It is a super-2 number, since 2×67229681² = 9039660014723522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67229641) 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, 33614840 + 33614841.

It is an arithmetic number, because the mean of its divisors is an integer number (33614841).

Almost surely, 2^67229681 is an apocalyptic number.

It is an amenable number.

67229681 is a deficient number, since it is larger than the sum of its proper divisors (1).

67229681 is an equidigital number, since it uses as much as digits as its factorization.

67229681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 67229681 is about 8199.3707685407. The cubic root of 67229681 is about 406.6183903844.

The spelling of 67229681 in words is "sixty-seven million, two hundred twenty-nine thousand, six hundred eighty-one".