165955806 has 24 divisors (see below), whose sum is σ = 371971080. Its totient is φ = 53410896.

The previous prime is 165955799. The next prime is 165955837. The reversal of 165955806 is 608559561.

It is a happy number.

165955806 is a `hidden beast` number, since 1 + 6 + 595 + 58 + 0 + 6 = 666.

165955806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158440 + ... + 159483.

It is an arithmetic number, because the mean of its divisors is an integer number (15498795).

Almost surely, 2^165955806 is an apocalyptic number.

165955806 is an abundant number, since it is smaller than the sum of its proper divisors (206015274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165955806 is a wasteful number, since it uses less digits than its factorization.

165955806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317960 (or 317957 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 165955806 is about 12882.3835527436. The cubic root of 165955806 is about 549.5376897444.

The spelling of 165955806 in words is "one hundred sixty-five million, nine hundred fifty-five thousand, eight hundred six".