67042081 has 2 divisors, whose sum is σ = 67042082. Its totient is φ = 67042080.

The previous prime is 67042049. The next prime is 67042091. The reversal of 67042081 is 18024076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47541025 + 19501056 = 6895^2 + 4416^2 .

It is a cyclic number.

It is not a de Polignac number, because 67042081 - 2⁵ = 67042049 is a prime.

It is a super-2 number, since 2×67042081² = 8989281249621122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67042021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33521040 + 33521041.

It is an arithmetic number, because the mean of its divisors is an integer number (33521041).

Almost surely, 2^67042081 is an apocalyptic number.

It is an amenable number.

67042081 is a deficient number, since it is larger than the sum of its proper divisors (1).

67042081 is an equidigital number, since it uses as much as digits as its factorization.

67042081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 67042081 is about 8187.9228745757. The cubic root of 67042081 is about 406.2398240923.

The spelling of 67042081 in words is "sixty-seven million, forty-two thousand, eighty-one".