165506087 has 2 divisors, whose sum is σ = 165506088. Its totient is φ = 165506086.

The previous prime is 165506059. The next prime is 165506113. The reversal of 165506087 is 780605561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165506087 - 2⁸ = 165505831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165506087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165506057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82753043 + 82753044.

It is an arithmetic number, because the mean of its divisors is an integer number (82753044).

Almost surely, 2^165506087 is an apocalyptic number.

165506087 is a deficient number, since it is larger than the sum of its proper divisors (1).

165506087 is an equidigital number, since it uses as much as digits as its factorization.

165506087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 165506087 is about 12864.9169060667. The cubic root of 165506087 is about 549.0408484066.

The spelling of 165506087 in words is "one hundred sixty-five million, five hundred six thousand, eighty-seven".