166065671 has 2 divisors, whose sum is σ = 166065672. Its totient is φ = 166065670.

The previous prime is 166065637. The next prime is 166065677. The reversal of 166065671 is 176560661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166065671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166065677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83032835 + 83032836.

It is an arithmetic number, because the mean of its divisors is an integer number (83032836).

Almost surely, 2^166065671 is an apocalyptic number.

166065671 is a deficient number, since it is larger than the sum of its proper divisors (1).

166065671 is an equidigital number, since it uses as much as digits as its factorization.

166065671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 166065671 is about 12886.6470037788. The cubic root of 166065671 is about 549.6589301349.

The spelling of 166065671 in words is "one hundred sixty-six million, sixty-five thousand, six hundred seventy-one".