165640151 has 2 divisors, whose sum is σ = 165640152. Its totient is φ = 165640150.

The previous prime is 165640133. The next prime is 165640187. The reversal of 165640151 is 151046561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165640151 - 2¹⁰ = 165639127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165640351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82820075 + 82820076.

It is an arithmetic number, because the mean of its divisors is an integer number (82820076).

Almost surely, 2^165640151 is an apocalyptic number.

165640151 is a deficient number, since it is larger than the sum of its proper divisors (1).

165640151 is an equidigital number, since it uses as much as digits as its factorization.

165640151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 165640151 is about 12870.1263008566. The cubic root of 165640151 is about 549.1890539261.

The spelling of 165640151 in words is "one hundred sixty-five million, six hundred forty thousand, one hundred fifty-one".