67042681 has 2 divisors, whose sum is σ = 67042682. Its totient is φ = 67042680.

The previous prime is 67042663. The next prime is 67042687. The reversal of 67042681 is 18624076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44156025 + 22886656 = 6645^2 + 4784^2 .

It is a cyclic number.

It is not a de Polignac number, because 67042681 - 2⁵ = 67042649 is a prime.

It is a super-2 number, since 2×67042681² = 8989442151335522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67042687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33521340 + 33521341.

It is an arithmetic number, because the mean of its divisors is an integer number (33521341).

Almost surely, 2^67042681 is an apocalyptic number.

It is an amenable number.

67042681 is a deficient number, since it is larger than the sum of its proper divisors (1).

67042681 is an equidigital number, since it uses as much as digits as its factorization.

67042681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 67042681 is about 8187.9595138227. The cubic root of 67042681 is about 406.2410359837.

The spelling of 67042681 in words is "sixty-seven million, forty-two thousand, six hundred eighty-one".