165716671 has 2 divisors, whose sum is σ = 165716672. Its totient is φ = 165716670.

The previous prime is 165716609. The next prime is 165716693. The reversal of 165716671 is 176617561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165716671 - 2⁷ = 165716543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165716171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82858335 + 82858336.

It is an arithmetic number, because the mean of its divisors is an integer number (82858336).

Almost surely, 2^165716671 is an apocalyptic number.

165716671 is a deficient number, since it is larger than the sum of its proper divisors (1).

165716671 is an equidigital number, since it uses as much as digits as its factorization.

165716671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 165716671 is about 12873.0987334053. The cubic root of 165716671 is about 549.2736096666.

The spelling of 165716671 in words is "one hundred sixty-five million, seven hundred sixteen thousand, six hundred seventy-one".