66171067 has 2 divisors, whose sum is σ = 66171068. Its totient is φ = 66171066.

The previous prime is 66170989. The next prime is 66171097. The reversal of 66171067 is 76017166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66171067 is a prime.

It is a super-2 number, since 2×66171067² = 8757220215836978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66171097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33085533 + 33085534.

It is an arithmetic number, because the mean of its divisors is an integer number (33085534).

Almost surely, 2^66171067 is an apocalyptic number.

66171067 is a deficient number, since it is larger than the sum of its proper divisors (1).

66171067 is an equidigital number, since it uses as much as digits as its factorization.

66171067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 66171067 is about 8134.5600372731. The cubic root of 66171067 is about 404.4728537692.

The spelling of 66171067 in words is "sixty-six million, one hundred seventy-one thousand, sixty-seven".