165550867 has 2 divisors, whose sum is σ = 165550868. Its totient is φ = 165550866.

The previous prime is 165550843. The next prime is 165550871. The reversal of 165550867 is 768055561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165550867 - 2⁷ = 165550739 is a prime.

It is not a weakly prime, because it can be changed into another prime (165550877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82775433 + 82775434.

It is an arithmetic number, because the mean of its divisors is an integer number (82775434).

Almost surely, 2^165550867 is an apocalyptic number.

165550867 is a deficient number, since it is larger than the sum of its proper divisors (1).

165550867 is an equidigital number, since it uses as much as digits as its factorization.

165550867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 165550867 is about 12866.6571804801. The cubic root of 165550867 is about 549.0903608497.

The spelling of 165550867 in words is "one hundred sixty-five million, five hundred fifty thousand, eight hundred sixty-seven".