165510907 has 2 divisors, whose sum is σ = 165510908. Its totient is φ = 165510906.

The previous prime is 165510901. The next prime is 165510911. The reversal of 165510907 is 709015561.

It is a strong prime.

It is an emirp because it is prime and its reverse (709015561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165510907 - 2¹⁵ = 165478139 is a prime.

It is not a weakly prime, because it can be changed into another prime (165510901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82755453 + 82755454.

It is an arithmetic number, because the mean of its divisors is an integer number (82755454).

Almost surely, 2^165510907 is an apocalyptic number.

165510907 is a deficient number, since it is larger than the sum of its proper divisors (1).

165510907 is an equidigital number, since it uses as much as digits as its factorization.

165510907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 165510907 is about 12865.1042358778. The cubic root of 165510907 is about 549.0461782230.

The spelling of 165510907 in words is "one hundred sixty-five million, five hundred ten thousand, nine hundred seven".