67166081 has 2 divisors, whose sum is σ = 67166082. Its totient is φ = 67166080.

The previous prime is 67166009. The next prime is 67166089. The reversal of 67166081 is 18066176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 6076225 = 7816^2 + 2465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67166081 is a prime.

It is a super-2 number, since 2×67166081² = 9022564873797122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67166089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33583040 + 33583041.

It is an arithmetic number, because the mean of its divisors is an integer number (33583041).

Almost surely, 2^67166081 is an apocalyptic number.

It is an amenable number.

67166081 is a deficient number, since it is larger than the sum of its proper divisors (1).

67166081 is an equidigital number, since it uses as much as digits as its factorization.

67166081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 67166081 is about 8195.4915044798. The cubic root of 67166081 is about 406.4901281425.

The spelling of 67166081 in words is "sixty-seven million, one hundred sixty-six thousand, eighty-one".