165501671 has 2 divisors, whose sum is σ = 165501672. Its totient is φ = 165501670.

The previous prime is 165501631. The next prime is 165501673. The reversal of 165501671 is 176105561.

It is a strong prime.

It is an emirp because it is prime and its reverse (176105561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165501671 - 2⁶ = 165501607 is a prime.

Together with 165501673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165501673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750835 + 82750836.

It is an arithmetic number, because the mean of its divisors is an integer number (82750836).

Almost surely, 2^165501671 is an apocalyptic number.

165501671 is a deficient number, since it is larger than the sum of its proper divisors (1).

165501671 is an equidigital number, since it uses as much as digits as its factorization.

165501671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 165501671 is about 12864.7452753640. The cubic root of 165501671 is about 549.0359652308.

The spelling of 165501671 in words is "one hundred sixty-five million, five hundred one thousand, six hundred seventy-one".